434 lines
14 KiB
C
434 lines
14 KiB
C
/*
|
|
* Copyright (c) 2020 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 TMidEqualizerContext {
|
|
const AVClass *class;
|
|
|
|
int planes;
|
|
int radius;
|
|
float sigma;
|
|
|
|
int plane_width[4], plane_height[4];
|
|
int nb_frames;
|
|
int depth;
|
|
int f_frames;
|
|
int l_frames;
|
|
int del_frame;
|
|
int cur_frame;
|
|
int nb_planes;
|
|
int histogram_size;
|
|
float kernel[127];
|
|
float *histogram[4][256];
|
|
float *change[4];
|
|
|
|
AVFrame **frames;
|
|
|
|
void (*compute_histogram)(const uint8_t *ssrc, ptrdiff_t linesize,
|
|
int w, int h, float *histogram, size_t hsize);
|
|
void (*apply_contrast_change)(const uint8_t *src, ptrdiff_t src_linesize,
|
|
uint8_t *dst, ptrdiff_t dst_linesize,
|
|
int w, int h, float *change, float *orig);
|
|
} TMidEqualizerContext;
|
|
|
|
#define OFFSET(x) offsetof(TMidEqualizerContext, x)
|
|
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
|
|
|
|
static const AVOption tmidequalizer_options[] = {
|
|
{ "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=5}, 1, 127, FLAGS },
|
|
{ "sigma", "set sigma", OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
|
|
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(tmidequalizer);
|
|
|
|
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_GBRP, AV_PIX_FMT_GBRAP,
|
|
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
|
|
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_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
|
|
AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14,
|
|
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_GBRAP10, AV_PIX_FMT_GBRAP12,
|
|
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
|
|
AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
|
|
AV_PIX_FMT_GBRP16, AV_PIX_FMT_GBRAP16,
|
|
AV_PIX_FMT_GRAY16,
|
|
AV_PIX_FMT_NONE
|
|
};
|
|
|
|
static void compute_contrast_function(const float *const histograms[256],
|
|
const float *const kernel,
|
|
int nb_frames, int radius, int hsize,
|
|
float *f, int idx)
|
|
{
|
|
const float *const h1 = histograms[idx];
|
|
int p2[256] = { 0 };
|
|
|
|
for (int p1 = 0; p1 < hsize; p1++) {
|
|
float weight = 1.f;
|
|
float sum = p1 * weight;
|
|
|
|
for (int j = 0; j < radius; j++) {
|
|
const int nidx = ((idx - radius + j) % nb_frames);
|
|
const float *const h2 = histograms[nidx < 0 ? nidx + nb_frames: nidx];
|
|
int k = j;
|
|
|
|
for (; p2[k] < hsize && h2[p2[k]] < h1[p1]; p2[k]++);
|
|
if (p2[k] == hsize)
|
|
p2[k]--;
|
|
|
|
weight += kernel[j];
|
|
sum += kernel[j] * p2[k];
|
|
}
|
|
|
|
for (int j = radius + 1; j < nb_frames; j++) {
|
|
const int nidx = (idx - radius + j) % nb_frames;
|
|
const float *const h2 = histograms[nidx < 0 ? nidx + nb_frames: nidx];
|
|
int k = j;
|
|
|
|
for (; p2[k] < hsize && h2[p2[k]] < h1[p1]; p2[k]++);
|
|
if (p2[k] == hsize)
|
|
p2[k]--;
|
|
|
|
weight += kernel[j - radius - 1];
|
|
sum += kernel[j - radius - 1] * p2[k];
|
|
}
|
|
|
|
f[p1] = sum / weight;
|
|
}
|
|
}
|
|
|
|
static void apply_contrast_change8(const uint8_t *src, ptrdiff_t src_linesize,
|
|
uint8_t *dst, ptrdiff_t dst_linesize,
|
|
int w, int h, float *change, float *orig)
|
|
{
|
|
for (int y = 0; y < h; y++) {
|
|
for (int x = 0; x < w; x++)
|
|
dst[x] = lrintf(change[src[x]]);
|
|
|
|
dst += dst_linesize;
|
|
src += src_linesize;
|
|
}
|
|
}
|
|
|
|
static void apply_contrast_change16(const uint8_t *ssrc, ptrdiff_t src_linesize,
|
|
uint8_t *ddst, ptrdiff_t dst_linesize,
|
|
int w, int h, float *change, float *orig)
|
|
{
|
|
const uint16_t *src = (const uint16_t *)ssrc;
|
|
uint16_t *dst = (uint16_t *)ddst;
|
|
|
|
for (int y = 0; y < h; y++) {
|
|
for (int x = 0; x < w; x++)
|
|
dst[x] = lrintf(change[src[x]]);
|
|
|
|
dst += dst_linesize / 2;
|
|
src += src_linesize / 2;
|
|
}
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
TMidEqualizerContext *s = ctx->priv;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
AVFrame *out;
|
|
int eof = 0;
|
|
|
|
if (!in) {
|
|
int idx = s->f_frames < s->nb_frames ? s->radius : s->del_frame ? s->del_frame - 1 : s->nb_frames - 1;
|
|
|
|
if (s->f_frames < s->nb_frames) {
|
|
s->l_frames = s->nb_frames - s->f_frames;
|
|
} else {
|
|
s->l_frames++;
|
|
}
|
|
in = av_frame_clone(s->frames[idx]);
|
|
if (!in)
|
|
return AVERROR(ENOMEM);
|
|
eof = 1;
|
|
}
|
|
|
|
if (s->f_frames < s->nb_frames) {
|
|
s->frames[s->f_frames] = in;
|
|
|
|
for (int p = 0; p < s->nb_planes; p++) {
|
|
s->compute_histogram(in->data[p], in->linesize[p],
|
|
s->plane_width[p], s->plane_height[p],
|
|
s->histogram[p][s->f_frames],
|
|
s->histogram_size);
|
|
}
|
|
|
|
s->f_frames++;
|
|
|
|
while (s->f_frames <= s->radius) {
|
|
s->frames[s->f_frames] = av_frame_clone(in);
|
|
if (!s->frames[s->f_frames])
|
|
return AVERROR(ENOMEM);
|
|
for (int p = 0; p < s->nb_planes; p++) {
|
|
memcpy(s->histogram[p][s->f_frames],
|
|
s->histogram[p][s->f_frames - 1],
|
|
s->histogram_size * sizeof(float));
|
|
}
|
|
s->f_frames++;
|
|
}
|
|
|
|
if (!eof && s->f_frames < s->nb_frames) {
|
|
return 0;
|
|
} else {
|
|
while (s->f_frames < s->nb_frames) {
|
|
s->frames[s->f_frames] = av_frame_clone(in);
|
|
if (!s->frames[s->f_frames])
|
|
return AVERROR(ENOMEM);
|
|
for (int p = 0; p < s->nb_planes; p++) {
|
|
memcpy(s->histogram[p][s->f_frames],
|
|
s->histogram[p][s->f_frames - 1],
|
|
s->histogram_size * sizeof(float));
|
|
}
|
|
s->f_frames++;
|
|
}
|
|
}
|
|
s->cur_frame = s->radius;
|
|
s->del_frame = 0;
|
|
} else {
|
|
av_frame_free(&s->frames[s->del_frame]);
|
|
s->frames[s->del_frame] = in;
|
|
|
|
for (int p = 0; p < s->nb_planes; p++) {
|
|
s->compute_histogram(in->data[p], in->linesize[p],
|
|
s->plane_width[p], s->plane_height[p],
|
|
s->histogram[p][s->del_frame],
|
|
s->histogram_size);
|
|
}
|
|
|
|
s->del_frame++;
|
|
if (s->del_frame >= s->nb_frames)
|
|
s->del_frame = 0;
|
|
}
|
|
|
|
if (ctx->is_disabled) {
|
|
const int idx = s->cur_frame;
|
|
|
|
out = av_frame_clone(s->frames[idx]);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
} else {
|
|
const int idx = s->cur_frame;
|
|
|
|
in = s->frames[idx];
|
|
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!out)
|
|
return AVERROR(ENOMEM);
|
|
av_frame_copy_props(out, in);
|
|
|
|
for (int p = 0; p < s->nb_planes; p++) {
|
|
if (!((1 << p) & s->planes)) {
|
|
av_image_copy_plane(out->data[p], out->linesize[p], in->data[p], in->linesize[p],
|
|
s->plane_width[p] * (1 + (s->depth > 8)), s->plane_height[p]);
|
|
continue;
|
|
}
|
|
|
|
compute_contrast_function((const float *const *)s->histogram[p], s->kernel,
|
|
s->nb_frames, s->radius, s->histogram_size, s->change[p], idx);
|
|
|
|
s->apply_contrast_change(in->data[p], in->linesize[p],
|
|
out->data[p], out->linesize[p],
|
|
s->plane_width[p], s->plane_height[p],
|
|
s->change[p], s->histogram[p][idx]);
|
|
}
|
|
}
|
|
|
|
s->cur_frame++;
|
|
if (s->cur_frame >= s->nb_frames)
|
|
s->cur_frame = 0;
|
|
|
|
return ff_filter_frame(outlink, out);
|
|
}
|
|
|
|
static void compute_histogram8(const uint8_t *src, ptrdiff_t linesize,
|
|
int w, int h, float *histogram, size_t hsize)
|
|
{
|
|
memset(histogram, 0, hsize * sizeof(*histogram));
|
|
|
|
for (int y = 0; y < h; y++) {
|
|
for (int x = 0; x < w; x++)
|
|
histogram[src[x]] += 1;
|
|
src += linesize;
|
|
}
|
|
|
|
for (int x = 0; x < hsize; x++)
|
|
histogram[x] /= hsize;
|
|
|
|
for (int x = 1; x < hsize; x++)
|
|
histogram[x] += histogram[x-1];
|
|
}
|
|
|
|
static void compute_histogram16(const uint8_t *ssrc, ptrdiff_t linesize,
|
|
int w, int h, float *histogram, size_t hsize)
|
|
{
|
|
const uint16_t *src = (const uint16_t *)ssrc;
|
|
|
|
memset(histogram, 0, hsize * sizeof(*histogram));
|
|
|
|
for (int y = 0; y < h; y++) {
|
|
for (int x = 0; x < w; x++)
|
|
histogram[src[x]] += 1;
|
|
src += linesize / 2;
|
|
}
|
|
|
|
for (int x = 0; x < hsize; x++)
|
|
histogram[x] /= hsize;
|
|
|
|
for (int x = 1; x < hsize; x++)
|
|
histogram[x] += histogram[x-1];
|
|
}
|
|
|
|
static int config_input(AVFilterLink *inlink)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
TMidEqualizerContext *s = ctx->priv;
|
|
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
|
|
float sigma = s->radius * s->sigma;
|
|
int vsub, hsub;
|
|
|
|
s->depth = desc->comp[0].depth;
|
|
s->nb_frames = s->radius * 2 + 1;
|
|
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
|
|
|
|
hsub = desc->log2_chroma_w;
|
|
vsub = desc->log2_chroma_h;
|
|
|
|
s->plane_height[0] = s->plane_height[3] = inlink->h;
|
|
s->plane_width[0] = s->plane_width[3] = inlink->w;
|
|
s->plane_height[1] = s->plane_height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
|
|
s->plane_width[1] = s->plane_width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
|
|
|
|
s->histogram_size = 1 << s->depth;
|
|
|
|
for (int n = 0; n < s->radius; n++)
|
|
s->kernel[n] = expf(-0.5 * (n + 1) * (n + 1) / (sigma * sigma));
|
|
|
|
for (int p = 0; p < s->nb_planes; p++) {
|
|
for (int n = 0; n < s->nb_frames; n++) {
|
|
s->histogram[p][n] = av_calloc(s->histogram_size, sizeof(float));
|
|
if (!s->histogram[p][n])
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
s->change[p] = av_calloc(s->histogram_size, sizeof(float));
|
|
if (!s->change[p])
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
if (!s->frames)
|
|
s->frames = av_calloc(s->nb_frames, sizeof(*s->frames));
|
|
if (!s->frames)
|
|
return AVERROR(ENOMEM);
|
|
|
|
s->compute_histogram = s->depth <= 8 ? compute_histogram8 : compute_histogram16;
|
|
s->apply_contrast_change = s->depth <= 8 ? apply_contrast_change8 : apply_contrast_change16;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int request_frame(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
TMidEqualizerContext *s = ctx->priv;
|
|
int ret;
|
|
|
|
ret = ff_request_frame(ctx->inputs[0]);
|
|
if (ret == AVERROR_EOF && s->l_frames < s->radius) {
|
|
ret = filter_frame(ctx->inputs[0], NULL);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void free_histograms(AVFilterContext *ctx, int x, int nb_frames)
|
|
{
|
|
TMidEqualizerContext *s = ctx->priv;
|
|
|
|
for (int n = 0; n < nb_frames; n++)
|
|
av_freep(&s->histogram[x][n]);
|
|
av_freep(&s->change[x]);
|
|
}
|
|
|
|
static av_cold void uninit(AVFilterContext *ctx)
|
|
{
|
|
TMidEqualizerContext *s = ctx->priv;
|
|
|
|
free_histograms(ctx, 0, s->nb_frames);
|
|
free_histograms(ctx, 1, s->nb_frames);
|
|
free_histograms(ctx, 2, s->nb_frames);
|
|
free_histograms(ctx, 3, s->nb_frames);
|
|
|
|
for (int i = 0; i < s->nb_frames && s->frames; i++)
|
|
av_frame_free(&s->frames[i]);
|
|
av_freep(&s->frames);
|
|
}
|
|
|
|
static const AVFilterPad tmidequalizer_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_input,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
static const AVFilterPad tmidequalizer_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.request_frame = request_frame,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_tmidequalizer = {
|
|
.name = "tmidequalizer",
|
|
.description = NULL_IF_CONFIG_SMALL("Apply Temporal Midway Equalization."),
|
|
.priv_size = sizeof(TMidEqualizerContext),
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(tmidequalizer_inputs),
|
|
FILTER_OUTPUTS(tmidequalizer_outputs),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.priv_class = &tmidequalizer_class,
|
|
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
|
|
};
|