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FFmpeg/libavfilter/vf_deflicker.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* Copyright (c) 2017 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/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/qsort.h"
#include "avfilter.h"
#define FF_BUFQUEUE_SIZE 129
#include "bufferqueue.h"
#include "internal.h"
#include "video.h"
#define SIZE FF_BUFQUEUE_SIZE
enum smooth_mode {
ARITHMETIC_MEAN,
GEOMETRIC_MEAN,
HARMONIC_MEAN,
QUADRATIC_MEAN,
CUBIC_MEAN,
POWER_MEAN,
MEDIAN,
NB_SMOOTH_MODE,
};
typedef struct DeflickerContext {
const AVClass *class;
int size;
int mode;
int bypass;
int eof;
int depth;
int nb_planes;
int planewidth[4];
int planeheight[4];
uint64_t *histogram;
float luminance[SIZE];
float sorted[SIZE];
struct FFBufQueue q;
int available;
void (*get_factor)(AVFilterContext *ctx, float *f);
float (*calc_avgy)(AVFilterContext *ctx, AVFrame *in);
int (*deflicker)(AVFilterContext *ctx, const uint8_t *src, ptrdiff_t src_linesize,
uint8_t *dst, ptrdiff_t dst_linesize, int w, int h, float f);
} DeflickerContext;
#define OFFSET(x) offsetof(DeflickerContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption deflicker_options[] = {
{ "size", "set how many frames to use", OFFSET(size), AV_OPT_TYPE_INT, {.i64=5}, 2, SIZE, FLAGS },
{ "s", "set how many frames to use", OFFSET(size), AV_OPT_TYPE_INT, {.i64=5}, 2, SIZE, FLAGS },
{ "mode", "set how to smooth luminance", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, NB_SMOOTH_MODE-1, FLAGS, .unit = "mode" },
{ "m", "set how to smooth luminance", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, NB_SMOOTH_MODE-1, FLAGS, .unit = "mode" },
{ "am", "arithmetic mean", 0, AV_OPT_TYPE_CONST, {.i64=ARITHMETIC_MEAN}, 0, 0, FLAGS, .unit = "mode" },
{ "gm", "geometric mean", 0, AV_OPT_TYPE_CONST, {.i64=GEOMETRIC_MEAN}, 0, 0, FLAGS, .unit = "mode" },
{ "hm", "harmonic mean", 0, AV_OPT_TYPE_CONST, {.i64=HARMONIC_MEAN}, 0, 0, FLAGS, .unit = "mode" },
{ "qm", "quadratic mean", 0, AV_OPT_TYPE_CONST, {.i64=QUADRATIC_MEAN}, 0, 0, FLAGS, .unit = "mode" },
{ "cm", "cubic mean", 0, AV_OPT_TYPE_CONST, {.i64=CUBIC_MEAN}, 0, 0, FLAGS, .unit = "mode" },
{ "pm", "power mean", 0, AV_OPT_TYPE_CONST, {.i64=POWER_MEAN}, 0, 0, FLAGS, .unit = "mode" },
{ "median", "median", 0, AV_OPT_TYPE_CONST, {.i64=MEDIAN}, 0, 0, FLAGS, .unit = "mode" },
{ "bypass", "leave frames unchanged", OFFSET(bypass), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(deflicker);
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_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_NONE
};
static int deflicker8(AVFilterContext *ctx,
const uint8_t *src, ptrdiff_t src_linesize,
uint8_t *dst, ptrdiff_t dst_linesize,
int w, int h, float f)
{
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = av_clip_uint8(src[x] * f);
}
dst += dst_linesize;
src += src_linesize;
}
return 0;
}
static int deflicker16(AVFilterContext *ctx,
const uint8_t *ssrc, ptrdiff_t src_linesize,
uint8_t *ddst, ptrdiff_t dst_linesize,
int w, int h, float f)
{
DeflickerContext *s = ctx->priv;
const uint16_t *src = (const uint16_t *)ssrc;
uint16_t *dst = (uint16_t *)ddst;
const int max = (1 << s->depth) - 1;
int x, y;
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
dst[x] = av_clip(src[x] * f, 0, max);
}
dst += dst_linesize / 2;
src += src_linesize / 2;
}
return 0;
}
static float calc_avgy8(AVFilterContext *ctx, AVFrame *in)
{
DeflickerContext *s = ctx->priv;
const uint8_t *src = in->data[0];
int64_t sum = 0;
int y, x;
memset(s->histogram, 0, (1 << s->depth) * sizeof(*s->histogram));
for (y = 0; y < s->planeheight[0]; y++) {
for (x = 0; x < s->planewidth[0]; x++) {
s->histogram[src[x]]++;
}
src += in->linesize[0];
}
for (y = 0; y < 1 << s->depth; y++) {
sum += s->histogram[y] * y;
}
return 1.0f * sum / (s->planeheight[0] * s->planewidth[0]);
}
static float calc_avgy16(AVFilterContext *ctx, AVFrame *in)
{
DeflickerContext *s = ctx->priv;
const uint16_t *src = (const uint16_t *)in->data[0];
int64_t sum = 0;
int y, x;
memset(s->histogram, 0, (1 << s->depth) * sizeof(*s->histogram));
for (y = 0; y < s->planeheight[0]; y++) {
for (x = 0; x < s->planewidth[0]; x++) {
s->histogram[src[x]]++;
}
src += in->linesize[0] / 2;
}
for (y = 0; y < 1 << s->depth; y++) {
sum += s->histogram[y] * y;
}
return 1.0f * sum / (s->planeheight[0] * s->planewidth[0]);
}
static void get_am_factor(AVFilterContext *ctx, float *f)
{
DeflickerContext *s = ctx->priv;
int y;
*f = 0.0f;
for (y = 0; y < s->size; y++) {
*f += s->luminance[y];
}
*f /= s->size;
*f /= s->luminance[0];
}
static void get_gm_factor(AVFilterContext *ctx, float *f)
{
DeflickerContext *s = ctx->priv;
int y;
*f = 1;
for (y = 0; y < s->size; y++) {
*f *= s->luminance[y];
}
*f = pow(*f, 1.0f / s->size);
*f /= s->luminance[0];
}
static void get_hm_factor(AVFilterContext *ctx, float *f)
{
DeflickerContext *s = ctx->priv;
int y;
*f = 0.0f;
for (y = 0; y < s->size; y++) {
*f += 1.0f / s->luminance[y];
}
*f = s->size / *f;
*f /= s->luminance[0];
}
static void get_qm_factor(AVFilterContext *ctx, float *f)
{
DeflickerContext *s = ctx->priv;
int y;
*f = 0.0f;
for (y = 0; y < s->size; y++) {
*f += s->luminance[y] * s->luminance[y];
}
*f /= s->size;
*f = sqrtf(*f);
*f /= s->luminance[0];
}
static void get_cm_factor(AVFilterContext *ctx, float *f)
{
DeflickerContext *s = ctx->priv;
int y;
*f = 0.0f;
for (y = 0; y < s->size; y++) {
*f += s->luminance[y] * s->luminance[y] * s->luminance[y];
}
*f /= s->size;
*f = cbrtf(*f);
*f /= s->luminance[0];
}
static void get_pm_factor(AVFilterContext *ctx, float *f)
{
DeflickerContext *s = ctx->priv;
int y;
*f = 0.0f;
for (y = 0; y < s->size; y++) {
*f += powf(s->luminance[y], s->size);
}
*f /= s->size;
*f = powf(*f, 1.0f / s->size);
*f /= s->luminance[0];
}
static int comparef(const void *a, const void *b)
{
const float *aa = a, *bb = b;
return round(aa - bb);
}
static void get_median_factor(AVFilterContext *ctx, float *f)
{
DeflickerContext *s = ctx->priv;
memcpy(s->sorted, s->luminance, sizeof(s->sorted));
AV_QSORT(s->sorted, s->size, float, comparef);
*f = s->sorted[s->size >> 1] / s->luminance[0];
}
static int config_input(AVFilterLink *inlink)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
AVFilterContext *ctx = inlink->dst;
DeflickerContext *s = ctx->priv;
s->nb_planes = desc->nb_components;
s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
s->planeheight[0] = s->planeheight[3] = inlink->h;
s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
s->planewidth[0] = s->planewidth[3] = inlink->w;
s->depth = desc->comp[0].depth;
if (s->depth == 8) {
s->deflicker = deflicker8;
s->calc_avgy = calc_avgy8;
} else {
s->deflicker = deflicker16;
s->calc_avgy = calc_avgy16;
}
s->histogram = av_calloc(1 << s->depth, sizeof(*s->histogram));
if (!s->histogram)
return AVERROR(ENOMEM);
switch (s->mode) {
case MEDIAN: s->get_factor = get_median_factor; break;
case ARITHMETIC_MEAN: s->get_factor = get_am_factor; break;
case GEOMETRIC_MEAN: s->get_factor = get_gm_factor; break;
case HARMONIC_MEAN: s->get_factor = get_hm_factor; break;
case QUADRATIC_MEAN: s->get_factor = get_qm_factor; break;
case CUBIC_MEAN: s->get_factor = get_cm_factor; break;
case POWER_MEAN: s->get_factor = get_pm_factor; break;
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
DeflickerContext *s = ctx->priv;
AVDictionary **metadata;
AVFrame *out, *in;
float f;
int y;
if (s->q.available < s->size && !s->eof) {
s->luminance[s->available] = s->calc_avgy(ctx, buf);
ff_bufqueue_add(ctx, &s->q, buf);
s->available++;
return 0;
}
in = ff_bufqueue_peek(&s->q, 0);
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&buf);
return AVERROR(ENOMEM);
}
s->get_factor(ctx, &f);
if (!s->bypass)
s->deflicker(ctx, in->data[0], in->linesize[0], out->data[0], out->linesize[0],
outlink->w, outlink->h, f);
for (y = 1 - s->bypass; y < s->nb_planes; y++) {
av_image_copy_plane(out->data[y], out->linesize[y],
in->data[y], in->linesize[y],
s->planewidth[y] * (1 + (s->depth > 8)), s->planeheight[y]);
}
av_frame_copy_props(out, in);
metadata = &out->metadata;
if (metadata) {
uint8_t value[128];
snprintf(value, sizeof(value), "%f", s->luminance[0]);
av_dict_set(metadata, "lavfi.deflicker.luminance", value, 0);
snprintf(value, sizeof(value), "%f", s->luminance[0] * f);
av_dict_set(metadata, "lavfi.deflicker.new_luminance", value, 0);
snprintf(value, sizeof(value), "%f", f - 1.0f);
av_dict_set(metadata, "lavfi.deflicker.relative_change", value, 0);
}
in = ff_bufqueue_get(&s->q);
av_frame_free(&in);
memmove(&s->luminance[0], &s->luminance[1], sizeof(*s->luminance) * (s->size - 1));
s->luminance[s->available - 1] = s->calc_avgy(ctx, buf);
ff_bufqueue_add(ctx, &s->q, buf);
return ff_filter_frame(outlink, out);
}
static int request_frame(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
DeflickerContext *s = ctx->priv;
int ret;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && s->available > 0) {
AVFrame *buf = ff_bufqueue_peek(&s->q, s->available - 1);
if (!buf)
return AVERROR(ENOMEM);
buf = av_frame_clone(buf);
if (!buf)
return AVERROR(ENOMEM);
s->eof = 1;
ret = filter_frame(ctx->inputs[0], buf);
s->available--;
}
return ret;
}
static av_cold void uninit(AVFilterContext *ctx)
{
DeflickerContext *s = ctx->priv;
ff_bufqueue_discard_all(&s->q);
av_freep(&s->histogram);
}
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,
.request_frame = request_frame,
},
};
const AVFilter ff_vf_deflicker = {
.name = "deflicker",
.description = NULL_IF_CONFIG_SMALL("Remove temporal frame luminance variations."),
.priv_size = sizeof(DeflickerContext),
.priv_class = &deflicker_class,
.uninit = uninit,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(outputs),
FILTER_PIXFMTS_ARRAY(pixel_fmts),
};
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