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/*
* Copyright (c) 2018 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct DedotContext {
const AVClass *class;
int m;
float lt;
float tl;
float tc;
float ct;
const AVPixFmtDescriptor *desc;
int depth;
int max;
int luma2d;
int lumaT;
int chromaT1;
int chromaT2;
int eof;
int eof_frames;
int nb_planes;
int planewidth[4];
int planeheight[4];
AVFrame *frames[5];
int (*dedotcrawl)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
int (*derainbow)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} DedotContext;
static const enum AVPixelFormat pixel_fmts[] = {
AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_NONE
};
#define DEFINE_DEDOTCRAWL(name, type, div) \
static int dedotcrawl##name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
DedotContext *s = ctx->priv; \
AVFrame *out = arg; \
int src_linesize = s->frames[2]->linesize[0] / div; \
int dst_linesize = out->linesize[0] / div; \
int p0_linesize = s->frames[0]->linesize[0] / div; \
int p1_linesize = s->frames[1]->linesize[0] / div; \
int p3_linesize = s->frames[3]->linesize[0] / div; \
int p4_linesize = s->frames[4]->linesize[0] / div; \
const int h = s->planeheight[0]; \
int slice_start = (h * jobnr) / nb_jobs; \
int slice_end = (h * (jobnr+1)) / nb_jobs; \
type *p0 = (type *)s->frames[0]->data[0]; \
type *p1 = (type *)s->frames[1]->data[0]; \
type *p3 = (type *)s->frames[3]->data[0]; \
type *p4 = (type *)s->frames[4]->data[0]; \
type *src = (type *)s->frames[2]->data[0]; \
type *dst = (type *)out->data[0]; \
const int luma2d = s->luma2d; \
const int lumaT = s->lumaT; \
\
if (!slice_start) { \
slice_start++; \
} \
p0 += p0_linesize * slice_start; \
p1 += p1_linesize * slice_start; \
p3 += p3_linesize * slice_start; \
p4 += p4_linesize * slice_start; \
src += src_linesize * slice_start; \
dst += dst_linesize * slice_start; \
if (slice_end == h) { \
slice_end--; \
} \
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 1; x < s->planewidth[0] - 1; x++) { \
int above = src[x - src_linesize]; \
int bellow = src[x + src_linesize]; \
int cur = src[x]; \
int left = src[x - 1]; \
int right = src[x + 1]; \
\
if (FFABS(above + bellow - 2 * cur) <= luma2d && \
FFABS(left + right - 2 * cur) <= luma2d) \
continue; \
\
if (FFABS(cur - p0[x]) <= lumaT && \
FFABS(cur - p4[x]) <= lumaT && \
FFABS(p1[x] - p3[x]) <= lumaT) { \
int diff1 = FFABS(cur - p1[x]); \
int diff2 = FFABS(cur - p3[x]); \
\
if (diff1 < diff2) \
dst[x] = (src[x] + p1[x] + 1) >> 1; \
else \
dst[x] = (src[x] + p3[x] + 1) >> 1; \
} \
} \
\
dst += dst_linesize; \
src += src_linesize; \
p0 += p0_linesize; \
p1 += p1_linesize; \
p3 += p3_linesize; \
p4 += p4_linesize; \
} \
return 0; \
}
DEFINE_DEDOTCRAWL(8, uint8_t, 1)
DEFINE_DEDOTCRAWL(16, uint16_t, 2)
typedef struct ThreadData {
AVFrame *out;
int plane;
} ThreadData;
#define DEFINE_DERAINBOW(name, type, div) \
static int derainbow##name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
DedotContext *s = ctx->priv; \
ThreadData *td = arg; \
AVFrame *out = td->out; \
const int plane = td->plane; \
const int h = s->planeheight[plane]; \
int slice_start = (h * jobnr) / nb_jobs; \
int slice_end = (h * (jobnr+1)) / nb_jobs; \
int src_linesize = s->frames[2]->linesize[plane] / div; \
int dst_linesize = out->linesize[plane] / div; \
int p0_linesize = s->frames[0]->linesize[plane] / div; \
int p1_linesize = s->frames[1]->linesize[plane] / div; \
int p3_linesize = s->frames[3]->linesize[plane] / div; \
int p4_linesize = s->frames[4]->linesize[plane] / div; \
type *p0 = (type *)s->frames[0]->data[plane]; \
type *p1 = (type *)s->frames[1]->data[plane]; \
type *p3 = (type *)s->frames[3]->data[plane]; \
type *p4 = (type *)s->frames[4]->data[plane]; \
type *src = (type *)s->frames[2]->data[plane]; \
type *dst = (type *)out->data[plane]; \
const int chromaT1 = s->chromaT1; \
const int chromaT2 = s->chromaT2; \
\
p0 += slice_start * p0_linesize; \
p1 += slice_start * p1_linesize; \
p3 += slice_start * p3_linesize; \
p4 += slice_start * p4_linesize; \
src += slice_start * src_linesize; \
dst += slice_start * dst_linesize; \
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < s->planewidth[plane]; x++) { \
int cur = src[x]; \
\
if (FFABS(cur - p0[x]) <= chromaT1 && \
FFABS(cur - p4[x]) <= chromaT1 && \
FFABS(p1[x] - p3[x]) <= chromaT1 && \
FFABS(cur - p1[x]) > chromaT2 && \
FFABS(cur - p3[x]) > chromaT2) { \
int diff1 = FFABS(cur - p1[x]); \
int diff2 = FFABS(cur - p3[x]); \
\
if (diff1 < diff2) \
dst[x] = (src[x] + p1[x] + 1) >> 1; \
else \
dst[x] = (src[x] + p3[x] + 1) >> 1; \
} \
} \
\
dst += dst_linesize; \
src += src_linesize; \
p0 += p0_linesize; \
p1 += p1_linesize; \
p3 += p3_linesize; \
p4 += p4_linesize; \
} \
return 0; \
}
DEFINE_DERAINBOW(8, uint8_t, 1)
DEFINE_DERAINBOW(16, uint16_t, 2)
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
DedotContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
s->desc = av_pix_fmt_desc_get(outlink->format);
if (!s->desc)
return AVERROR_BUG;
s->nb_planes = av_pix_fmt_count_planes(outlink->format);
s->depth = s->desc->comp[0].depth;
s->max = (1 << s->depth) - 1;
s->luma2d = s->lt * s->max;
s->lumaT = s->tl * s->max;
s->chromaT1 = s->tc * s->max;
s->chromaT2 = s->ct * s->max;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
if (s->depth <= 8) {
s->dedotcrawl = dedotcrawl8;
s->derainbow = derainbow8;
} else {
s->dedotcrawl = dedotcrawl16;
s->derainbow = derainbow16;
}
return 0;
}
static int activate(AVFilterContext *ctx)
{
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
DedotContext *s = ctx->priv;
AVFrame *frame = NULL;
int64_t pts;
int status;
int ret = 0;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
if (s->eof == 0) {
ret = ff_inlink_consume_frame(inlink, &frame);
if (ret < 0)
return ret;
}
if (frame || s->eof_frames > 0) {
AVFrame *out = NULL;
if (frame) {
for (int i = 2; i < 5; i++) {
if (!s->frames[i])
s->frames[i] = av_frame_clone(frame);
}
av_frame_free(&frame);
} else if (s->frames[3]) {
s->eof_frames--;
s->frames[4] = av_frame_clone(s->frames[3]);
}
if (s->frames[0] &&
s->frames[1] &&
s->frames[2] &&
s->frames[3] &&
s->frames[4]) {
out = av_frame_clone(s->frames[2]);
if (out && !ctx->is_disabled) {
ret = ff_inlink_make_frame_writable(inlink, &out);
if (ret >= 0) {
if (s->m & 1)
ff_filter_execute(ctx, s->dedotcrawl, out, NULL,
FFMIN(ff_filter_get_nb_threads(ctx),
s->planeheight[0]));
if (s->m & 2) {
ThreadData td;
td.out = out; td.plane = 1;
ff_filter_execute(ctx, s->derainbow, &td, NULL,
FFMIN(ff_filter_get_nb_threads(ctx),
s->planeheight[1]));
td.plane = 2;
ff_filter_execute(ctx, s->derainbow, &td, NULL,
FFMIN(ff_filter_get_nb_threads(ctx),
s->planeheight[2]));
}
} else
av_frame_free(&out);
} else if (!out) {
ret = AVERROR(ENOMEM);
}
}
av_frame_free(&s->frames[0]);
s->frames[0] = s->frames[1];
s->frames[1] = s->frames[2];
s->frames[2] = s->frames[3];
s->frames[3] = s->frames[4];
s->frames[4] = NULL;
if (ret < 0)
return ret;
if (out)
return ff_filter_frame(outlink, out);
}
if (s->eof) {
if (s->eof_frames <= 0) {
ff_outlink_set_status(outlink, AVERROR_EOF, s->frames[2]->pts);
} else {
ff_filter_set_ready(ctx, 10);
}
return 0;
}
if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (status == AVERROR_EOF) {
s->eof = 1;
s->eof_frames = !!s->frames[0] + !!s->frames[1];
if (s->eof_frames <= 0) {
ff_outlink_set_status(outlink, AVERROR_EOF, pts);
return 0;
}
ff_filter_set_ready(ctx, 10);
return 0;
}
}
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
static av_cold void uninit(AVFilterContext *ctx)
{
DedotContext *s = ctx->priv;
for (int i = 0; i < 5; i++)
av_frame_free(&s->frames[i]);
}
#define OFFSET(x) offsetof(DedotContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
static const AVOption dedot_options[] = {
{ "m", "set filtering mode", OFFSET( m), AV_OPT_TYPE_FLAGS, {.i64=3}, 0, 3, FLAGS, "m" },
{ "dotcrawl", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "m" },
{ "rainbows", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "m" },
{ "lt", "set spatial luma threshold", OFFSET(lt), AV_OPT_TYPE_FLOAT, {.dbl=.079}, 0, 1, FLAGS },
{ "tl", "set tolerance for temporal luma", OFFSET(tl), AV_OPT_TYPE_FLOAT, {.dbl=.079}, 0, 1, FLAGS },
{ "tc", "set tolerance for chroma temporal variation", OFFSET(tc), AV_OPT_TYPE_FLOAT, {.dbl=.058}, 0, 1, FLAGS },
{ "ct", "set temporal chroma threshold", OFFSET(ct), AV_OPT_TYPE_FLOAT, {.dbl=.019}, 0, 1, FLAGS },
{ NULL },
};
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
AVFILTER_DEFINE_CLASS(dedot);
const AVFilter ff_vf_dedot = {
.name = "dedot",
.description = NULL_IF_CONFIG_SMALL("Reduce cross-luminance and cross-color."),
.priv_size = sizeof(DedotContext),
.priv_class = &dedot_class,
.activate = activate,
.uninit = uninit,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_PIXFMTS_ARRAY(pixel_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
};
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