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FFmpeg/libavfilter/vf_monochrome.c
Andreas Rheinhardt 31a373ce71 avfilter: Reindentation after query_formats changes
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2021-10-05 18:58:29 +02:00

302 lines
10 KiB
C

/*
* Copyright (c) 2021 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 <float.h>
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct MonochromeContext {
const AVClass *class;
float b, r;
float size;
float high;
int depth;
int subw, subh;
int (*do_slice)(AVFilterContext *s, void *arg,
int jobnr, int nb_jobs);
int (*clear_uv)(AVFilterContext *s, void *arg,
int jobnr, int nb_jobs);
} MonochromeContext;
static float envelope(const float x)
{
const float beta = 0.6f;
if (x < beta) {
const float tmp = fabsf(x / beta - 1.f);
return 1.f - tmp * tmp;
} else {
const float tmp = (1.f - x) / (1.f - beta);
return tmp * tmp * (3.f - 2.f * tmp);
}
}
static float filter(float b, float r, float u, float v, float size)
{
return expf(-av_clipf(((b - u) * (b - u) +
(r - v) * (r - v)) *
size, 0.f, 1.f));
}
#define PROCESS() \
const int cx = x >> subw; \
float y = yptr[x] * imax; \
float u = uptr[cx] * imax - .5f; \
float v = vptr[cx] * imax - .5f; \
float tt, t, ny; \
\
ny = filter(b, r, u, v, size); \
tt = envelope(y); \
t = tt + (1.f - tt) * ihigh; \
ny = (1.f - t) * y + t * ny * y;
static int monochrome_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
MonochromeContext *s = ctx->priv;
AVFrame *frame = arg;
const int depth = s->depth;
const int subw = s->subw;
const int subh = s->subh;
const float max = (1 << depth) - 1;
const float imax = 1.f / max;
const int width = frame->width;
const int height = frame->height;
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const int ylinesize = frame->linesize[0];
const int ulinesize = frame->linesize[1];
const int vlinesize = frame->linesize[2];
uint8_t *yptr = frame->data[0] + slice_start * ylinesize;
const float ihigh = 1.f - s->high;
const float size = 1.f / s->size;
const float b = s->b * .5f;
const float r = s->r * .5f;
for (int y = slice_start; y < slice_end; y++) {
const int cy = y >> subh;
uint8_t *uptr = frame->data[1] + cy * ulinesize;
uint8_t *vptr = frame->data[2] + cy * vlinesize;
for (int x = 0; x < width; x++) {
PROCESS()
yptr[x] = av_clip_uint8(ny * max);
}
yptr += ylinesize;
}
return 0;
}
static int monochrome_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
MonochromeContext *s = ctx->priv;
AVFrame *frame = arg;
const int depth = s->depth;
const int subw = s->subw;
const int subh = s->subh;
const float max = (1 << depth) - 1;
const float imax = 1.f / max;
const int width = frame->width;
const int height = frame->height;
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const int ylinesize = frame->linesize[0] / 2;
const int ulinesize = frame->linesize[1] / 2;
const int vlinesize = frame->linesize[2] / 2;
uint16_t *yptr = (uint16_t *)frame->data[0] + slice_start * ylinesize;
const float ihigh = 1.f - s->high;
const float size = 1.f / s->size;
const float b = s->b * .5f;
const float r = s->r * .5f;
for (int y = slice_start; y < slice_end; y++) {
const int cy = y >> subh;
uint16_t *uptr = (uint16_t *)frame->data[1] + cy * ulinesize;
uint16_t *vptr = (uint16_t *)frame->data[2] + cy * vlinesize;
for (int x = 0; x < width; x++) {
PROCESS()
yptr[x] = av_clip_uintp2_c(ny * max, depth);
}
yptr += ylinesize;
}
return 0;
}
static int clear_slice8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
MonochromeContext *s = ctx->priv;
AVFrame *frame = arg;
const int depth = s->depth;
const int half = 1 << (depth - 1);
const int subw = s->subw;
const int subh = s->subh;
const int width = AV_CEIL_RSHIFT(frame->width, subw);
const int height = AV_CEIL_RSHIFT(frame->height, subh);
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const int ulinesize = frame->linesize[1];
const int vlinesize = frame->linesize[2];
for (int y = slice_start; y < slice_end; y++) {
uint8_t *uptr = frame->data[1] + y * ulinesize;
uint8_t *vptr = frame->data[2] + y * vlinesize;
memset(uptr, half, width);
memset(vptr, half, width);
}
return 0;
}
static int clear_slice16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
MonochromeContext *s = ctx->priv;
AVFrame *frame = arg;
const int depth = s->depth;
const int half = 1 << (depth - 1);
const int subw = s->subw;
const int subh = s->subh;
const int width = AV_CEIL_RSHIFT(frame->width, subw);
const int height = AV_CEIL_RSHIFT(frame->height, subh);
const int slice_start = (height * jobnr) / nb_jobs;
const int slice_end = (height * (jobnr + 1)) / nb_jobs;
const int ulinesize = frame->linesize[1] / 2;
const int vlinesize = frame->linesize[2] / 2;
for (int y = slice_start; y < slice_end; y++) {
uint16_t *uptr = (uint16_t *)frame->data[1] + y * ulinesize;
uint16_t *vptr = (uint16_t *)frame->data[2] + y * vlinesize;
for (int x = 0; x < width; x++) {
uptr[x] = half;
vptr[x] = half;
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
MonochromeContext *s = ctx->priv;
ff_filter_execute(ctx, s->do_slice, frame, NULL,
FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
ff_filter_execute(ctx, s->clear_uv, frame, NULL,
FFMIN(frame->height >> s->subh, ff_filter_get_nb_threads(ctx)));
return ff_filter_frame(ctx->outputs[0], frame);
}
static const enum AVPixelFormat pixel_fmts[] = {
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 av_cold int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
MonochromeContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
s->depth = desc->comp[0].depth;
s->do_slice = s->depth <= 8 ? monochrome_slice8 : monochrome_slice16;
s->clear_uv = s->depth <= 8 ? clear_slice8 : clear_slice16;
s->subw = desc->log2_chroma_w;
s->subh = desc->log2_chroma_h;
return 0;
}
static const AVFilterPad monochrome_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad monochrome_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
#define OFFSET(x) offsetof(MonochromeContext, x)
#define VF AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption monochrome_options[] = {
{ "cb", "set the chroma blue spot", OFFSET(b), AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
{ "cr", "set the chroma red spot", OFFSET(r), AV_OPT_TYPE_FLOAT, {.dbl=0},-1, 1, VF },
{ "size", "set the color filter size", OFFSET(size), AV_OPT_TYPE_FLOAT, {.dbl=1},.1,10, VF },
{ "high", "set the highlights strength", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, 1, VF },
{ NULL }
};
AVFILTER_DEFINE_CLASS(monochrome);
const AVFilter ff_vf_monochrome = {
.name = "monochrome",
.description = NULL_IF_CONFIG_SMALL("Convert video to gray using custom color filter."),
.priv_size = sizeof(MonochromeContext),
.priv_class = &monochrome_class,
FILTER_INPUTS(monochrome_inputs),
FILTER_OUTPUTS(monochrome_outputs),
FILTER_PIXFMTS_ARRAY(pixel_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};