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FFmpeg/libavfilter/vf_maskfun.c
Paul B Mahol 1ea5529dd2 avfilter: add maskfun filter
2019-01-12 19:49:15 +01:00

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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/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct MaskFunContext {
const AVClass *class;
int low, high;
int planes;
int fill;
int sum;
int linesize[4];
int width[4], height[4];
int nb_planes;
int depth;
int max;
uint64_t max_sum;
AVFrame *empty;
int (*getsum)(AVFilterContext *ctx, AVFrame *out);
int (*maskfun)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} MaskFunContext;
#define OFFSET(x) offsetof(MaskFunContext, x)
#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption maskfun_options[] = {
{ "low", "set low threshold", OFFSET(low), AV_OPT_TYPE_INT, {.i64=10}, 0, UINT16_MAX, VF },
{ "high", "set high threshold", OFFSET(high), AV_OPT_TYPE_INT, {.i64=10}, 0, UINT16_MAX, VF },
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, VF },
{ "fill", "set fill value", OFFSET(fill), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, VF },
{ "sum", "set sum value", OFFSET(sum), AV_OPT_TYPE_INT, {.i64=10}, 0, UINT16_MAX, VF },
{ NULL }
};
AVFILTER_DEFINE_CLASS(maskfun);
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_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_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));
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
MaskFunContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
if (s->getsum(ctx, frame)) {
AVFrame *out = av_frame_clone(s->empty);
if (!out) {
av_frame_free(&frame);
return AVERROR(ENOMEM);
}
out->pts = frame->pts;
av_frame_free(&frame);
return ff_filter_frame(outlink, out);
}
ctx->internal->execute(ctx, s->maskfun, frame, NULL,
FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
return ff_filter_frame(outlink, frame);
}
#define GETSUM(name, type, div) \
static int getsum##name(AVFilterContext *ctx, AVFrame *out) \
{ \
MaskFunContext *s = ctx->priv; \
uint64_t sum = 0; \
int p; \
\
for (p = 0; p < s->nb_planes; p++) { \
const int linesize = out->linesize[p] / div; \
const int w = s->width[p]; \
const int h = s->height[p]; \
type *dst = (type *)out->data[p]; \
\
if (!((1 << p) & s->planes)) \
continue; \
\
for (int y = 0; y < h; y++) { \
for (int x = 0; x < w; x++) \
sum += dst[x]; \
if (sum >= s->max_sum) \
return 1; \
dst += linesize; \
} \
} \
\
return 0; \
}
GETSUM(8, uint8_t, 1)
GETSUM(16, uint16_t, 2)
#define MASKFUN(name, type, div) \
static int maskfun##name(AVFilterContext *ctx, void *arg, \
int jobnr, int nb_jobs) \
{ \
MaskFunContext *s = ctx->priv; \
AVFrame *out = arg; \
const int low = s->low; \
const int high = s->high; \
const int max = s->max; \
int p; \
\
for (p = 0; p < s->nb_planes; p++) { \
const int linesize = out->linesize[p] / div; \
const int w = s->width[p]; \
const int h = s->height[p]; \
const int slice_start = (h * jobnr) / nb_jobs; \
const int slice_end = (h * (jobnr+1)) / nb_jobs; \
type *dst = (type *)out->data[p] + slice_start * linesize; \
\
if (!((1 << p) & s->planes)) \
continue; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < w; x++) { \
if (dst[x] <= low) \
dst[x] = 0; \
else if (dst[x] > high) \
dst[x] = max; \
} \
\
dst += linesize; \
} \
} \
\
return 0; \
}
MASKFUN(8, uint8_t, 1)
MASKFUN(16, uint16_t, 2)
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
MaskFunContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub, ret;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
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;
s->max = (1 << s->depth) - 1;
s->fill = FFMIN(s->fill, s->max);
if (s->depth == 8) {
s->maskfun = maskfun8;
s->getsum = getsum8;
} else {
s->maskfun = maskfun16;
s->getsum = getsum16;
}
s->empty = ff_get_video_buffer(inlink, inlink->w, inlink->h);
if (!s->empty)
return AVERROR(ENOMEM);
if (s->depth == 8) {
for (int p = 0; p < s->nb_planes; p++) {
uint8_t *dst = s->empty->data[p];
for (int y = 0; y < s->height[p]; y++) {
memset(dst, s->fill, s->width[p]);
dst += s->empty->linesize[p];
}
}
} else {
for (int p = 0; p < s->nb_planes; p++) {
uint16_t *dst = (uint16_t *)s->empty->data[p];
for (int y = 0; y < s->height[p]; y++) {
for (int x = 0; x < s->width[p]; x++)
dst[x] = s->fill;
dst += s->empty->linesize[p] / 2;
}
}
}
s->max_sum = 0;
for (int p = 0; p < s->nb_planes; p++) {
if (!((1 << p) & s->planes))
continue;
s->max_sum += (uint64_t)s->sum * s->width[p] * s->height[p];
}
return 0;
}
static const AVFilterPad maskfun_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
.needs_writable = 1,
},
{ NULL }
};
static const AVFilterPad maskfun_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_maskfun = {
.name = "maskfun",
.description = NULL_IF_CONFIG_SMALL("Create Mask."),
.priv_size = sizeof(MaskFunContext),
.query_formats = query_formats,
.inputs = maskfun_inputs,
.outputs = maskfun_outputs,
.priv_class = &maskfun_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
};
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