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FFmpeg4/libavfilter/vf_threshold.c

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/*
* Copyright (c) 2016 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
*/
/**
* @file
* threshold video filter
*/
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "framesync.h"
#include "internal.h"
#include "video.h"
#include "threshold.h"
#define OFFSET(x) offsetof(ThresholdContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption threshold_options[] = {
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS},
{ NULL }
};
AVFILTER_DEFINE_CLASS(threshold);
static int query_formats(AVFilterContext *ctx)
{
static const enum AVPixelFormat pix_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_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_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12 , AV_PIX_FMT_GBRAP16,
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_NONE
};
return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
}
typedef struct ThreadData {
AVFrame *in;
AVFrame *threshold;
AVFrame *min;
AVFrame *max;
AVFrame *out;
} ThreadData;
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ThresholdContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *min = td->min;
AVFrame *max = td->max;
AVFrame *threshold = td->threshold;
AVFrame *in = td->in;
AVFrame *out = td->out;
for (int p = 0; p < s->nb_planes; p++) {
const int h = s->height[p];
const int slice_start = (h * jobnr) / nb_jobs;
const int slice_end = (h * (jobnr+1)) / nb_jobs;
if (!(s->planes & (1 << p))) {
av_image_copy_plane(out->data[p] + slice_start * out->linesize[p],
out->linesize[p],
in->data[p] + slice_start * in->linesize[p],
in->linesize[p],
s->width[p] * s->bpc,
slice_end - slice_start);
continue;
}
s->threshold(in->data[p] + slice_start * in->linesize[p],
threshold->data[p] + slice_start * threshold->linesize[p],
min->data[p] + slice_start * min->linesize[p],
max->data[p] + slice_start * max->linesize[p],
out->data[p] + slice_start * out->linesize[p],
in->linesize[p], threshold->linesize[p],
min->linesize[p], max->linesize[p],
out->linesize[p],
s->width[p], slice_end - slice_start);
}
return 0;
}
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
ThresholdContext *s = fs->opaque;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *in, *threshold, *min, *max;
ThreadData td;
int ret;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &threshold, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 2, &min, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 3, &max, 0)) < 0)
return ret;
if (ctx->is_disabled) {
out = av_frame_clone(in);
if (!out)
return AVERROR(ENOMEM);
} else {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
av_frame_copy_props(out, in);
td.out = out;
td.in = in;
td.threshold = threshold;
td.min = min;
td.max = max;
ctx->internal->execute(ctx, filter_slice, &td, NULL,
FFMIN(s->height[2], ff_filter_get_nb_threads(ctx)));
}
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
return ff_filter_frame(outlink, out);
}
static void threshold8(const uint8_t *in, const uint8_t *threshold,
const uint8_t *min, const uint8_t *max,
uint8_t *out,
ptrdiff_t ilinesize, ptrdiff_t tlinesize,
ptrdiff_t flinesize, ptrdiff_t slinesize,
ptrdiff_t olinesize,
int w, int h)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
out[x] = in[x] < threshold[x] ? min[x] : max[x];
}
in += ilinesize;
threshold += tlinesize;
min += flinesize;
max += slinesize;
out += olinesize;
}
}
static void threshold16(const uint8_t *iin, const uint8_t *tthreshold,
const uint8_t *ffirst, const uint8_t *ssecond,
uint8_t *oout,
ptrdiff_t ilinesize, ptrdiff_t tlinesize,
ptrdiff_t flinesize, ptrdiff_t slinesize,
ptrdiff_t olinesize,
int w, int h)
{
const uint16_t *in = (const uint16_t *)iin;
const uint16_t *threshold = (const uint16_t *)tthreshold;
const uint16_t *min = (const uint16_t *)ffirst;
const uint16_t *max = (const uint16_t *)ssecond;
uint16_t *out = (uint16_t *)oout;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
out[x] = in[x] < threshold[x] ? min[x] : max[x];
}
in += ilinesize / 2;
threshold += tlinesize / 2;
min += flinesize / 2;
max += slinesize / 2;
out += olinesize / 2;
}
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ThresholdContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->height[0] = s->height[3] = inlink->h;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->width[0] = s->width[3] = inlink->w;
s->depth = desc->comp[0].depth;
ff_threshold_init(s);
return 0;
}
void ff_threshold_init(ThresholdContext *s)
{
if (s->depth == 8) {
s->threshold = threshold8;
s->bpc = 1;
} else {
s->threshold = threshold16;
s->bpc = 2;
}
if (ARCH_X86)
ff_threshold_init_x86(s);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
ThresholdContext *s = ctx->priv;
AVFilterLink *base = ctx->inputs[0];
AVFilterLink *threshold = ctx->inputs[1];
AVFilterLink *min = ctx->inputs[2];
AVFilterLink *max = ctx->inputs[3];
FFFrameSyncIn *in;
int ret;
if (base->format != threshold->format ||
base->format != min->format ||
base->format != max->format) {
av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
return AVERROR(EINVAL);
}
if (base->w != threshold->w ||
base->h != threshold->h ||
base->w != min->w ||
base->h != min->h ||
base->w != max->w ||
base->h != max->h) {
av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
"(size %dx%d) do not match the corresponding "
"second input link %s parameters (%dx%d) "
"and/or third input link %s parameters (%dx%d) "
"and/or fourth input link %s parameters (%dx%d)\n",
ctx->input_pads[0].name, base->w, base->h,
ctx->input_pads[1].name, threshold->w, threshold->h,
ctx->input_pads[2].name, min->w, min->h,
ctx->input_pads[3].name, max->w, max->h);
return AVERROR(EINVAL);
}
outlink->w = base->w;
outlink->h = base->h;
outlink->sample_aspect_ratio = base->sample_aspect_ratio;
outlink->frame_rate = base->frame_rate;
if ((ret = ff_framesync_init(&s->fs, ctx, 4)) < 0)
return ret;
in = s->fs.in;
in[0].time_base = base->time_base;
in[1].time_base = threshold->time_base;
in[2].time_base = min->time_base;
in[3].time_base = max->time_base;
in[0].sync = 1;
in[0].before = EXT_STOP;
in[0].after = EXT_STOP;
in[1].sync = 1;
in[1].before = EXT_STOP;
in[1].after = EXT_STOP;
in[2].sync = 1;
in[2].before = EXT_STOP;
in[2].after = EXT_STOP;
in[3].sync = 1;
in[3].before = EXT_STOP;
in[3].after = EXT_STOP;
s->fs.opaque = s;
s->fs.on_event = process_frame;
ret = ff_framesync_configure(&s->fs);
outlink->time_base = s->fs.time_base;
return ret;
}
static int activate(AVFilterContext *ctx)
{
ThresholdContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static av_cold void uninit(AVFilterContext *ctx)
{
ThresholdContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
},
{
.name = "threshold",
.type = AVMEDIA_TYPE_VIDEO,
},
{
.name = "min",
.type = AVMEDIA_TYPE_VIDEO,
},
{
.name = "max",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
{ NULL }
};
AVFilter ff_vf_threshold = {
.name = "threshold",
.description = NULL_IF_CONFIG_SMALL("Threshold first video stream using other video streams."),
.priv_size = sizeof(ThresholdContext),
.priv_class = &threshold_class,
.uninit = uninit,
.query_formats = query_formats,
.activate = activate,
.inputs = inputs,
.outputs = outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
};
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