GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/vf_despill.c Lines: 0 51 0.0 %
Date: 2020-09-25 23:16:12 Branches: 0 28 0.0 %

Line Branch Exec Source
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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(redscale),    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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};