mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
8 years ago
parent
6cadbb16e9
commit
6faa1275a2
6 changed files with 222 additions and 1 deletions
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/*
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* Copyright (c) 2017 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/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 DespillContext { |
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const AVClass *class; |
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int co[4]; /* color offsets rgba */ |
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int alpha; |
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int type; |
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float spillmix; |
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float spillexpand; |
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float redscale; |
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float greenscale; |
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float bluescale; |
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float brightness; |
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} DespillContext; |
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static int do_despill_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) |
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{ |
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DespillContext *s = ctx->priv; |
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AVFrame *frame = arg; |
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const int ro = s->co[0], go = s->co[1], bo = s->co[2], ao = s->co[3]; |
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const int slice_start = (frame->height * jobnr) / nb_jobs; |
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const int slice_end = (frame->height * (jobnr + 1)) / nb_jobs; |
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const float brightness = s->brightness; |
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const float redscale = s->redscale; |
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const float greenscale = s->greenscale; |
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const float bluescale = s->bluescale; |
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const float spillmix = s->spillmix; |
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const float factor = (1.f - spillmix) * (1.f - s->spillexpand); |
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float red, green, blue; |
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int x, y; |
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for (y = slice_start; y < slice_end; y++) { |
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uint8_t *dst = frame->data[0] + y * frame->linesize[0]; |
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for (x = 0; x < frame->width; x++) { |
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float spillmap; |
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red = dst[x * 4 + ro] / 255.f; |
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green = dst[x * 4 + go] / 255.f; |
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blue = dst[x * 4 + bo] / 255.f; |
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if (s->type) { |
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spillmap = FFMAX(blue - (red * spillmix + green * factor), 0.f); |
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} else { |
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spillmap = FFMAX(green - (red * spillmix + blue * factor), 0.f); |
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} |
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red = FFMAX(red + spillmap * redscale + brightness * spillmap, 0.f); |
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green = FFMAX(green + spillmap * greenscale + brightness * spillmap, 0.f); |
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blue = FFMAX(blue + spillmap * bluescale + brightness * spillmap, 0.f); |
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dst[x * 4 + ro] = av_clip_uint8(red * 255); |
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dst[x * 4 + go] = av_clip_uint8(green * 255); |
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dst[x * 4 + bo] = av_clip_uint8(blue * 255); |
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if (s->alpha) { |
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spillmap = 1.f - spillmap; |
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dst[x * 4 + ao] = av_clip_uint8(spillmap * 255); |
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} |
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} |
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} |
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return 0; |
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} |
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static int filter_frame(AVFilterLink *link, AVFrame *frame) |
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{ |
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AVFilterContext *ctx = link->dst; |
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int ret; |
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if (ret = av_frame_make_writable(frame)) |
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return ret; |
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if (ret = ctx->internal->execute(ctx, do_despill_slice, frame, NULL, FFMIN(frame->height, ff_filter_get_nb_threads(ctx)))) |
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return ret; |
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return ff_filter_frame(ctx->outputs[0], frame); |
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} |
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static av_cold int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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DespillContext *s = ctx->priv; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); |
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int i; |
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for (i = 0; i < 4; ++i) |
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s->co[i] = desc->comp[i].offset; |
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return 0; |
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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_ARGB, |
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AV_PIX_FMT_RGBA, |
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AV_PIX_FMT_ABGR, |
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AV_PIX_FMT_BGRA, |
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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 const AVFilterPad despill_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 despill_outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_output, |
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}, |
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{ NULL } |
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}; |
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#define OFFSET(x) offsetof(DespillContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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static const AVOption despill_options[] = { |
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{ "type", "set the screen type", OFFSET(type), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "type" }, |
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{ "green", "greenscreen", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "type" }, |
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{ "blue", "bluescreen", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "type" }, |
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{ "mix", "set the spillmap mix", OFFSET(spillmix), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS }, |
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{ "expand", "set the spillmap expand", OFFSET(spillexpand), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, FLAGS }, |
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{ "red", "set red scale", OFFSET(bluescale), AV_OPT_TYPE_FLOAT, {.dbl=0}, -100, 100, FLAGS }, |
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{ "green", "set green scale", OFFSET(greenscale), AV_OPT_TYPE_FLOAT, {.dbl=-1}, -100, 100, FLAGS }, |
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{ "blue", "set blue scale", OFFSET(bluescale), AV_OPT_TYPE_FLOAT, {.dbl=0}, -100, 100, FLAGS }, |
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{ "brightness", "set brightness", OFFSET(brightness), AV_OPT_TYPE_FLOAT, {.dbl=0}, -10, 10, FLAGS }, |
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{ "alpha", "change alpha component", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(despill); |
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AVFilter ff_vf_despill = { |
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.name = "despill", |
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.description = NULL_IF_CONFIG_SMALL("Despill video."), |
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.priv_size = sizeof(DespillContext), |
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.priv_class = &despill_class, |
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.query_formats = query_formats, |
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.inputs = despill_inputs, |
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.outputs = despill_outputs, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, |
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}; |
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