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ffmpeg/libavfilter/vf_xmedian.c

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/*
* 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 "config_components.h"
#include "libavutil/avstring.h"
#include "libavutil/imgutils.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/qsort.h"
#include "avfilter.h"
#include "internal.h"
#include "framesync.h"
#include "video.h"
typedef struct XMedianContext {
const AVClass *class;
const AVPixFmtDescriptor *desc;
int nb_inputs;
int nb_frames;
int nb_threads;
int planes;
float percentile;
int xmedian;
int radius;
int index;
int depth;
int max;
int nb_planes;
int linesizes[4];
int width[4];
int height[4];
uint8_t **data;
int *linesize;
AVFrame **frames;
FFFrameSync fs;
int (*median_frames)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} XMedianContext;
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_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_YUVA444P9, AV_PIX_FMT_YUVA444P10, AV_PIX_FMT_YUVA444P12, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA422P16,
AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA420P16,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_NONE
};
static av_cold int init(AVFilterContext *ctx)
{
XMedianContext *s = ctx->priv;
if (!s->xmedian)
s->nb_inputs = s->radius * 2 + 1;
if (s->nb_inputs & 1)
s->index = s->radius * 2.f * s->percentile;
else
s->index = av_clip(s->radius * 2.f * s->percentile, 1, s->nb_inputs - 1);
s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
if (!s->frames)
return AVERROR(ENOMEM);
return 0;
}
typedef struct ThreadData {
AVFrame **in, *out;
} ThreadData;
static int compare8(const void *p1, const void *p2)
{
int left = *(const uint8_t *)p1;
int right = *(const uint8_t *)p2;
return FFDIFFSIGN(left, right);
}
static int compare16(const void *p1, const void *p2)
{
int left = *(const uint16_t *)p1;
int right = *(const uint16_t *)p2;
return FFDIFFSIGN(left, right);
}
#define MEDIAN_SLICE(name, type, comparei) \
static int median_frames ## name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
{ \
XMedianContext *s = ctx->priv; \
ThreadData *td = arg; \
AVFrame **in = td->in; \
AVFrame *out = td->out; \
const int nb_inputs = s->nb_inputs; \
uint8_t **srcf = s->data + jobnr * nb_inputs; \
int *linesize = s->linesize + jobnr * nb_inputs; \
const int radius = s->radius; \
const int index = s->index; \
type values[256]; \
\
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 int width = s->width[p]; \
type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
ptrdiff_t dst_linesize = out->linesize[p] / sizeof(type); \
\
if (!((1 << p) & s->planes)) { \
av_image_copy_plane((uint8_t *)dst, out->linesize[p], \
in[radius]->data[p] + slice_start * in[radius]->linesize[p], \
in[radius]->linesize[p], \
s->linesizes[p], slice_end - slice_start); \
continue; \
} \
\
for (int i = 0; i < nb_inputs; i++) \
linesize[i] = in[i]->linesize[p]; \
\
for (int i = 0; i < nb_inputs; i++) \
srcf[i] = in[i]->data[p] + slice_start * linesize[i]; \
\
for (int y = slice_start; y < slice_end; y++) { \
for (int x = 0; x < width; x++) { \
for (int i = 0; i < nb_inputs; i++) { \
const type *src = (const type *)srcf[i]; \
values[i] = src[x]; \
} \
\
AV_QSORT(values, nb_inputs, type, comparei); \
if (nb_inputs & 1) \
dst[x] = values[index]; \
else \
dst[x] = (values[index] + values[index - 1]) >> 1; \
} \
\
dst += dst_linesize; \
for (int i = 0; i < nb_inputs; i++) \
srcf[i] += linesize[i]; \
} \
} \
\
return 0; \
}
MEDIAN_SLICE(8, uint8_t, compare8)
MEDIAN_SLICE(16, uint16_t, compare16)
static void update_index(XMedianContext *s)
{
if (s->nb_inputs & 1)
s->index = s->radius * 2.f * s->percentile;
else
s->index = av_clip(s->radius * 2.f * s->percentile, 1, s->nb_inputs - 1);
}
static int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
AVFilterLink *outlink = ctx->outputs[0];
XMedianContext *s = fs->opaque;
AVFrame **in = s->frames;
AVFrame *out;
ThreadData td;
int i, ret;
update_index(s);
for (i = 0; i < s->nb_inputs; i++) {
if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
return ret;
}
if (ctx->is_disabled) {
out = av_frame_clone(in[0]);
} else {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
}
if (!out)
return AVERROR(ENOMEM);
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
if (!ctx->is_disabled) {
td.in = in;
td.out = out;
ff_filter_execute(ctx, s->median_frames, &td, NULL,
FFMIN(s->height[1], s->nb_threads));
}
return ff_filter_frame(outlink, out);
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
XMedianContext *s = ctx->priv;
AVRational frame_rate = ctx->inputs[0]->frame_rate;
AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
AVFilterLink *inlink = ctx->inputs[0];
int height = ctx->inputs[0]->h;
int width = ctx->inputs[0]->w;
FFFrameSyncIn *in;
int i, ret;
for (int i = 1; i < s->nb_inputs && s->xmedian; i++) {
if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
av_log(ctx, AV_LOG_ERROR, "Input %d size (%dx%d) does not match input %d size (%dx%d).\n", i, ctx->inputs[i]->w, ctx->inputs[i]->h, 0, width, height);
return AVERROR(EINVAL);
}
}
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->nb_threads = ff_filter_get_nb_threads(ctx);
if (s->depth <= 8)
s->median_frames = median_frames8;
else
s->median_frames = median_frames16;
if ((ret = av_image_fill_linesizes(s->linesizes, inlink->format, inlink->w)) < 0)
return ret;
s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
s->width[0] = s->width[3] = inlink->w;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
s->height[0] = s->height[3] = inlink->h;
s->data = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->data));
if (!s->data)
return AVERROR(ENOMEM);
s->linesize = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->linesize));
if (!s->linesize)
return AVERROR(ENOMEM);
if (!s->xmedian)
return 0;
outlink->w = width;
outlink->h = height;
outlink->frame_rate = frame_rate;
outlink->sample_aspect_ratio = sar;
if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
return ret;
in = s->fs.in;
s->fs.opaque = s;
s->fs.on_event = process_frame;
for (i = 0; i < s->nb_inputs; i++) {
AVFilterLink *inlink = ctx->inputs[i];
in[i].time_base = inlink->time_base;
in[i].sync = 1;
in[i].before = EXT_STOP;
in[i].after = EXT_INFINITY;
}
ret = ff_framesync_configure(&s->fs);
outlink->time_base = s->fs.time_base;
return ret;
}
static av_cold void uninit(AVFilterContext *ctx)
{
XMedianContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
for (int i = 0; i < s->nb_frames && s->frames && !s->xmedian; i++)
av_frame_free(&s->frames[i]);
av_freep(&s->frames);
av_freep(&s->data);
av_freep(&s->linesize);
}
static int activate(AVFilterContext *ctx)
{
XMedianContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
#if CONFIG_XMEDIAN_FILTER
static av_cold int xmedian_init(AVFilterContext *ctx)
{
XMedianContext *s = ctx->priv;
int ret;
s->xmedian = 1;
s->radius = s->nb_inputs / 2;
for (int i = 0; i < s->nb_inputs; i++) {
AVFilterPad pad = { 0 };
pad.type = AVMEDIA_TYPE_VIDEO;
pad.name = av_asprintf("input%d", i);
if (!pad.name)
return AVERROR(ENOMEM);
if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
return ret;
}
return init(ctx);
}
#define OFFSET(x) offsetof(XMedianContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
#define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption xmedian_options[] = {
{ "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 3, 255, .flags = FLAGS },
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags =TFLAGS },
{ "percentile", "set percentile", OFFSET(percentile),AV_OPT_TYPE_FLOAT,{.dbl=0.5}, 0, 1, .flags =TFLAGS },
{ NULL },
};
FRAMESYNC_DEFINE_CLASS(xmedian, XMedianContext, fs);
const AVFilter ff_vf_xmedian = {
.name = "xmedian",
.description = NULL_IF_CONFIG_SMALL("Pick median pixels from several video inputs."),
.priv_size = sizeof(XMedianContext),
.priv_class = &xmedian_class,
FILTER_OUTPUTS(outputs),
FILTER_PIXFMTS_ARRAY(pixel_fmts),
.preinit = xmedian_framesync_preinit,
.init = xmedian_init,
.uninit = uninit,
.activate = activate,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS |
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
.process_command = ff_filter_process_command,
};
#endif /* CONFIG_XMEDIAN_FILTER */
#if CONFIG_TMEDIAN_FILTER
static int tmedian_filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
XMedianContext *s = ctx->priv;
ThreadData td;
AVFrame *out;
update_index(s);
if (s->nb_frames < s->nb_inputs) {
s->frames[s->nb_frames] = in;
s->nb_frames++;
if (s->nb_frames < s->nb_inputs)
return 0;
} else {
av_frame_free(&s->frames[0]);
memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
s->frames[s->nb_inputs - 1] = in;
}
if (ctx->is_disabled) {
out = av_frame_clone(s->frames[0]);
if (!out)
return AVERROR(ENOMEM);
return ff_filter_frame(outlink, out);
}
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
out->pts = s->frames[0]->pts;
td.out = out;
td.in = s->frames;
ff_filter_execute(ctx, s->median_frames, &td, NULL,
FFMIN(s->height[1], s->nb_threads));
return ff_filter_frame(outlink, out);
}
static const AVOption tmedian_options[] = {
{ "radius", "set median filter radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=1}, 1, 127, .flags = FLAGS },
{ "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags =TFLAGS },
{ "percentile", "set percentile", OFFSET(percentile), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, .flags =TFLAGS },
{ NULL },
};
static const AVFilterPad tmedian_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = tmedian_filter_frame,
},
};
AVFILTER_DEFINE_CLASS(tmedian);
const AVFilter ff_vf_tmedian = {
.name = "tmedian",
.description = NULL_IF_CONFIG_SMALL("Pick median pixels from successive frames."),
.priv_size = sizeof(XMedianContext),
.priv_class = &tmedian_class,
FILTER_INPUTS(tmedian_inputs),
FILTER_OUTPUTS(outputs),
FILTER_PIXFMTS_ARRAY(pixel_fmts),
.init = init,
.uninit = uninit,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};
#endif /* CONFIG_TMEDIAN_FILTER */
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