1
0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-02 03:06:28 +02:00
FFmpeg/libavfilter/vf_lagfun.c

253 lines
7.8 KiB
C
Raw Normal View History

2019-04-15 22:00:00 +02:00
/*
* Copyright (c) 2019 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/intreadwrite.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct LagfunContext {
const AVClass *class;
const AVPixFmtDescriptor *desc;
float decay;
int planes;
int depth;
int nb_planes;
int linesize[4];
int height[4];
AVFrame *old;
int (*lagfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} LagfunContext;
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pixel_fmts[] = {
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9,
AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
AV_PIX_FMT_GRAY16,
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P,
AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_YUVJ411P,
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_YUV440P10,
AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV420P12,
AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV444P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV420P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_NONE
};
AVFilterFormats *formats = ff_make_format_list(pixel_fmts);
if (!formats)
return AVERROR(ENOMEM);
return ff_set_common_formats(ctx, formats);
}
typedef struct ThreadData {
AVFrame *in, *out, *old;
} ThreadData;
static int lagfun_frame8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
LagfunContext *s = ctx->priv;
const float decay = s->decay;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
AVFrame *old = td->old;
for (int p = 0; p < s->nb_planes; p++) {
const int slice_start = (s->height[p] * jobnr) / nb_jobs;
const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
const uint8_t *src = in->data[p] + slice_start * in->linesize[p];
const uint8_t *osrc = old->data[p] + slice_start * old->linesize[p];
uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
if (!((1 << p) & s->planes)) {
av_image_copy_plane(dst, out->linesize[p],
src, in->linesize[p],
s->linesize[p], slice_end - slice_start);
continue;
}
for (int y = slice_start; y < slice_end; y++) {
for (int x = 0; x < s->linesize[p]; x++)
dst[x] = FFMAX(src[x], osrc[x] * decay);
src += in->linesize[p];
osrc += old->linesize[p];
dst += out->linesize[p];
}
}
return 0;
}
static int lagfun_frame16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
LagfunContext *s = ctx->priv;
const float decay = s->decay;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
AVFrame *old = td->old;
for (int p = 0; p < s->nb_planes; p++) {
const int slice_start = (s->height[p] * jobnr) / nb_jobs;
const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
const uint16_t *src = (const uint16_t *)in->data[p] + slice_start * in->linesize[p] / 2;
const uint16_t *osrc = (const uint16_t *)old->data[p] + slice_start * old->linesize[p] / 2;
uint16_t *dst = (uint16_t *)out->data[p] + slice_start * out->linesize[p] / 2;
if (!((1 << p) & s->planes)) {
av_image_copy_plane((uint8_t *)dst, out->linesize[p],
(uint8_t *)src, in->linesize[p],
s->linesize[p], slice_end - slice_start);
continue;
}
for (int y = slice_start; y < slice_end; y++) {
for (int x = 0; x < s->linesize[p]; x++)
dst[x] = FFMAX(src[x], osrc[x] * decay);
src += in->linesize[p] / 2;
osrc += old->linesize[p] / 2;
dst += out->linesize[p] / 2;
}
}
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
LagfunContext *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int ret;
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->lagfun = s->depth <= 8 ? lagfun_frame8 : lagfun_frame16;
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
s->height[0] = s->height[3] = inlink->h;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
LagfunContext *s = ctx->priv;
ThreadData td;
AVFrame *out;
if (!s->old) {
s->old = av_frame_clone(in);
return ff_filter_frame(outlink, in);
}
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
out->pts = in->pts;
td.out = out;
td.in = in;
td.old = s->old;
ctx->internal->execute(ctx, s->lagfun, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
av_frame_free(&s->old);
av_frame_free(&in);
s->old = av_frame_clone(out);
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
LagfunContext *s = ctx->priv;
av_frame_free(&s->old);
}
#define OFFSET(x) offsetof(LagfunContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
static const AVOption lagfun_options[] = {
{ "decay", "set decay", OFFSET(decay), AV_OPT_TYPE_FLOAT, {.dbl=.95}, 0, 1, FLAGS },
{ "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, FLAGS },
{ NULL },
};
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFILTER_DEFINE_CLASS(lagfun);
AVFilter ff_vf_lagfun = {
.name = "lagfun",
.description = NULL_IF_CONFIG_SMALL("Slowly update darker pixels."),
.priv_size = sizeof(LagfunContext),
.priv_class = &lagfun_class,
.query_formats = query_formats,
.uninit = uninit,
.outputs = outputs,
.inputs = inputs,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};