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vf_limiter.c
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vf_limiter.c
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/*
* 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/attributes.h"
#include "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "limiter.h"
#include "video.h"
typedef struct ThreadData {
AVFrame *in;
AVFrame *out;
} ThreadData;
typedef struct LimiterContext {
const AVClass *class;
int min;
int max;
int planes;
int nb_planes;
int linesize[4];
int width[4];
int height[4];
LimiterDSPContext dsp;
} LimiterContext;
#define OFFSET(x) offsetof(LimiterContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption limiter_options[] = {
{ "min", "set min value", OFFSET(min), AV_OPT_TYPE_INT, {.i64=0}, 0, 65535, .flags = FLAGS },
{ "max", "set max value", OFFSET(max), AV_OPT_TYPE_INT, {.i64=65535}, 0, 65535, .flags = FLAGS },
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags = FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(limiter);
static av_cold int init(AVFilterContext *ctx)
{
LimiterContext *s = ctx->priv;
if (s->min > s->max)
return AVERROR(EINVAL);
return 0;
}
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_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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
};
static void limiter8(const uint8_t *src, uint8_t *dst,
ptrdiff_t slinesize, ptrdiff_t dlinesize,
int w, int h, int min, int max)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = av_clip(src[x], min, max);
}
dst += dlinesize;
src += slinesize;
}
}
static void limiter16(const uint8_t *ssrc, uint8_t *ddst,
ptrdiff_t slinesize, ptrdiff_t dlinesize,
int w, int h, int min, int max)
{
const uint16_t *src = (const uint16_t *)ssrc;
uint16_t *dst = (uint16_t *)ddst;
int x, y;
dlinesize /= 2;
slinesize /= 2;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = av_clip(src[x], min, max);
}
dst += dlinesize;
src += slinesize;
}
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
LimiterContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int depth, 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;
depth = desc->comp[0].depth;
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->max = FFMIN(s->max, (1 << depth) - 1);
s->min = FFMIN(s->min, (1 << depth) - 1);
if (depth == 8) {
s->dsp.limiter = limiter8;
} else {
s->dsp.limiter = limiter16;
}
if (ARCH_X86)
ff_limiter_init_x86(&s->dsp, desc->comp[0].depth);
return 0;
}
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
LimiterContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
int p;
for (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 (!((1 << p) & s->planes)) {
if (out != in)
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->linesize[p], slice_end - slice_start);
continue;
}
s->dsp.limiter(in->data[p] + slice_start * in->linesize[p],
out->data[p] + slice_start * out->linesize[p],
in->linesize[p], out->linesize[p],
s->width[p], slice_end - slice_start,
s->min, s->max);
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
LimiterContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td;
AVFrame *out;
if (av_frame_is_writable(in)) {
out = in;
} else {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
}
td.out = out;
td.in = in;
ff_filter_execute(ctx, filter_slice, &td, NULL,
FFMIN(s->height[2], ff_filter_get_nb_threads(ctx)));
if (out != in)
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return config_input(ctx->inputs[0]);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
const AVFilter ff_vf_limiter = {
.name = "limiter",
.description = NULL_IF_CONFIG_SMALL("Limit pixels components to the specified range."),
.priv_size = sizeof(LimiterContext),
.priv_class = &limiter_class,
.init = init,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};