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FFmpeg/libavfilter/vf_midequalizer.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

378 lines
12 KiB
C

/*
* 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/pixdesc.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
#include "framesync.h"
typedef struct MidEqualizerContext {
const AVClass *class;
int width[2][4], height[2][4];
int nb_planes;
int planes;
int histogram_size;
float *histogram[2];
unsigned *cchange;
FFFrameSync fs;
void (*midequalizer)(const uint8_t *in0, const uint8_t *in1,
uint8_t *dst,
ptrdiff_t linesize1, ptrdiff_t linesize2,
ptrdiff_t dlinesize,
int w0, int h0,
int w1, int h1,
float *histogram1, float *histogram2,
unsigned *cchange, size_t hsize);
} MidEqualizerContext;
#define OFFSET(x) offsetof(MidEqualizerContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption midequalizer_options[] = {
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(midequalizer);
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 int process_frame(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
MidEqualizerContext *s = fs->opaque;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out, *in0, *in1;
int ret;
if ((ret = ff_framesync_get_frame(&s->fs, 0, &in0, 0)) < 0 ||
(ret = ff_framesync_get_frame(&s->fs, 1, &in1, 0)) < 0)
return ret;
if (ctx->is_disabled) {
out = av_frame_clone(in0);
if (!out)
return AVERROR(ENOMEM);
} else {
int p;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
av_frame_copy_props(out, in0);
for (p = 0; p < s->nb_planes; p++) {
if (!((1 << p) & s->planes)) {
av_image_copy_plane(out->data[p], out->linesize[p], in0->data[p], in0->linesize[p],
s->width[0][p] * (1 + (s->histogram_size > 256)), s->height[0][p]);
continue;
}
s->midequalizer(in0->data[p], in1->data[p],
out->data[p],
in0->linesize[p], in1->linesize[p],
out->linesize[p],
s->width[0][p], s->height[0][p],
s->width[1][p], s->height[1][p],
s->histogram[0], s->histogram[1],
s->cchange, s->histogram_size);
}
}
out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
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)
{
int y, x;
memset(histogram, 0, hsize * sizeof(*histogram));
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
histogram[src[x]] += 1;
}
src += linesize;
}
for (x = 0; x < hsize - 1; x++) {
histogram[x + 1] += histogram[x];
histogram[x] /= hsize;
}
histogram[x] /= hsize;
}
static void compute_histogram16(const uint16_t *src, ptrdiff_t linesize,
int w, int h, float *histogram, size_t hsize)
{
int y, x;
memset(histogram, 0, hsize * sizeof(*histogram));
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
histogram[src[x]] += 1;
}
src += linesize;
}
for (x = 0; x < hsize - 1; x++) {
histogram[x + 1] += histogram[x];
histogram[x] /= hsize;
}
histogram[x] /= hsize;
}
static void compute_contrast_change(float *histogram1, float *histogram2,
unsigned *cchange, size_t hsize)
{
int i;
for (i = 0; i < hsize; i++) {
int j;
for (j = 0; j < hsize && histogram2[j] < histogram1[i]; j++);
cchange[i] = (i + j) / 2;
}
}
static void midequalizer8(const uint8_t *in0, const uint8_t *in1,
uint8_t *dst,
ptrdiff_t linesize1, ptrdiff_t linesize2,
ptrdiff_t dlinesize,
int w0, int h0,
int w1, int h1,
float *histogram1, float *histogram2,
unsigned *cchange,
size_t hsize)
{
int x, y;
compute_histogram8(in0, linesize1, w0, h0, histogram1, hsize);
compute_histogram8(in1, linesize2, w1, h1, histogram2, hsize);
compute_contrast_change(histogram1, histogram2, cchange, hsize);
for (y = 0; y < h0; y++) {
for (x = 0; x < w0; x++) {
dst[x] = av_clip_uint8(cchange[in0[x]]);
}
dst += dlinesize;
in0 += linesize1;
}
}
static void midequalizer16(const uint8_t *in0, const uint8_t *in1,
uint8_t *dst,
ptrdiff_t linesize1, ptrdiff_t linesize2,
ptrdiff_t dlinesize,
int w0, int h0,
int w1, int h1,
float *histogram1, float *histogram2,
unsigned *cchange,
size_t hsize)
{
const uint16_t *i = (const uint16_t *)in0;
uint16_t *d = (uint16_t *)dst;
int x, y;
compute_histogram16(i, linesize1 / 2, w0, h0, histogram1, hsize);
compute_histogram16((const uint16_t *)in1, linesize2 / 2, w1, h1, histogram2, hsize);
compute_contrast_change(histogram1, histogram2, cchange, hsize);
for (y = 0; y < h0; y++) {
for (x = 0; x < w0; x++) {
d[x] = cchange[i[x]];
}
d += dlinesize / 2;
i += linesize1 / 2;
}
}
static int config_input0(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
MidEqualizerContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[0][0] = s->height[0][3] = inlink->h;
s->width[0][0] = s->width[0][3] = inlink->w;
s->height[0][1] = s->height[0][2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->width[0][1] = s->width[0][2] = AV_CEIL_RSHIFT(inlink->w, hsub);
s->histogram_size = 1 << desc->comp[0].depth;
s->histogram[0] = av_calloc(s->histogram_size, sizeof(float));
s->histogram[1] = av_calloc(s->histogram_size, sizeof(float));
s->cchange = av_calloc(s->histogram_size, sizeof(unsigned));
if (!s->histogram[0] || !s->histogram[1] || !s->cchange)
return AVERROR(ENOMEM);
if (s->histogram_size == 256) {
s->midequalizer = midequalizer8;
} else {
s->midequalizer = midequalizer16;
}
return 0;
}
static int config_input1(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
MidEqualizerContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1][0] = s->height[1][3] = inlink->h;
s->width[1][0] = s->width[1][3] = inlink->w;
s->height[1][1] = s->height[1][2] = AV_CEIL_RSHIFT(inlink->h, vsub);
s->width[1][1] = s->width[1][2] = AV_CEIL_RSHIFT(inlink->w, hsub);
return 0;
}
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
MidEqualizerContext *s = ctx->priv;
AVFilterLink *in0 = ctx->inputs[0];
AVFilterLink *in1 = ctx->inputs[1];
FFFrameSyncIn *in;
int ret;
outlink->w = in0->w;
outlink->h = in0->h;
outlink->sample_aspect_ratio = in0->sample_aspect_ratio;
outlink->frame_rate = in0->frame_rate;
if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
return ret;
in = s->fs.in;
in[0].time_base = in0->time_base;
in[1].time_base = in1->time_base;
in[0].sync = 1;
in[0].before = EXT_STOP;
in[0].after = EXT_INFINITY;
in[1].sync = 1;
in[1].before = EXT_STOP;
in[1].after = EXT_INFINITY;
s->fs.opaque = s;
s->fs.on_event = process_frame;
ret = ff_framesync_configure(&s->fs);
outlink->time_base = s->fs.time_base;
return ret;
}
static int activate(AVFilterContext *ctx)
{
MidEqualizerContext *s = ctx->priv;
return ff_framesync_activate(&s->fs);
}
static av_cold void uninit(AVFilterContext *ctx)
{
MidEqualizerContext *s = ctx->priv;
ff_framesync_uninit(&s->fs);
av_freep(&s->histogram[0]);
av_freep(&s->histogram[1]);
av_freep(&s->cchange);
}
static const AVFilterPad midequalizer_inputs[] = {
{
.name = "in0",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input0,
},
{
.name = "in1",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input1,
},
};
static const AVFilterPad midequalizer_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_midequalizer = {
.name = "midequalizer",
.description = NULL_IF_CONFIG_SMALL("Apply Midway Equalization."),
.priv_size = sizeof(MidEqualizerContext),
.uninit = uninit,
.activate = activate,
FILTER_INPUTS(midequalizer_inputs),
FILTER_OUTPUTS(midequalizer_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.priv_class = &midequalizer_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL,
};