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vf_estdif.c
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/*
* 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 "libavutil/common.h"
#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct ESTDIFContext {
const AVClass *class;
int mode; ///< 0 is frame, 1 is field
int parity; ///< frame field parity
int deint; ///< which frames to deinterlace
int rslope; ///< best edge slope search radius
int redge; ///< best edge match search radius
int ecost; ///< edge cost for edge matching
int mcost; ///< middle cost for edge matching
int dcost; ///< distance cost for edge matching
int interp; ///< type of interpolation
int linesize[4]; ///< bytes of pixel data per line for each plane
int planewidth[4]; ///< width of each plane
int planeheight[4]; ///< height of each plane
int field; ///< which field are we on, 0 or 1
int eof;
int depth;
int max;
int nb_planes;
int nb_threads;
AVFrame *prev;
void (*interpolate)(struct ESTDIFContext *s, uint8_t *dst,
const uint8_t *prev_line, const uint8_t *next_line,
const uint8_t *prev2_line, const uint8_t *next2_line,
const uint8_t *prev3_line, const uint8_t *next3_line,
int x, int width, int rslope, int redge,
int depth, int *K);
unsigned (*mid_8[3])(const uint8_t *const prev,
const uint8_t *const next,
const uint8_t *const prev2,
const uint8_t *const next2,
const uint8_t *const prev3,
const uint8_t *const next3,
int end, int x, int k, int depth);
unsigned (*mid_16[3])(const uint16_t *const prev,
const uint16_t *const next,
const uint16_t *const prev2,
const uint16_t *const next2,
const uint16_t *const prev3,
const uint16_t *const next3,
int end, int x, int k, int depth);
} ESTDIFContext;
#define MAX_R 15
#define S (MAX_R * 2 + 1)
#define OFFSET(x) offsetof(ESTDIFContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
#define CONST(name, help, val, u) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, .unit = u }
static const AVOption estdif_options[] = {
{ "mode", "specify the mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, .unit = "mode" },
CONST("frame", "send one frame for each frame", 0, "mode"),
CONST("field", "send one frame for each field", 1, "mode"),
{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=-1}, -1, 1, FLAGS, .unit = "parity" },
CONST("tff", "assume top field first", 0, "parity"),
CONST("bff", "assume bottom field first", 1, "parity"),
CONST("auto", "auto detect parity", -1, "parity"),
{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "deint" },
CONST("all", "deinterlace all frames", 0, "deint"),
CONST("interlaced", "only deinterlace frames marked as interlaced", 1, "deint"),
{ "rslope", "specify the search radius for edge slope tracing", OFFSET(rslope), AV_OPT_TYPE_INT, {.i64=1}, 1, MAX_R, FLAGS },
{ "redge", "specify the search radius for best edge matching", OFFSET(redge), AV_OPT_TYPE_INT, {.i64=2}, 0, MAX_R, FLAGS },
{ "ecost", "specify the edge cost for edge matching", OFFSET(ecost), AV_OPT_TYPE_INT, {.i64=2}, 0, 50, FLAGS },
{ "mcost", "specify the middle cost for edge matching", OFFSET(mcost), AV_OPT_TYPE_INT, {.i64=1}, 0, 50, FLAGS },
{ "dcost", "specify the distance cost for edge matching", OFFSET(dcost), AV_OPT_TYPE_INT, {.i64=1}, 0, 50, FLAGS },
{ "interp", "specify the type of interpolation", OFFSET(interp), AV_OPT_TYPE_INT, {.i64=1}, 0, 2, FLAGS, .unit = "interp" },
CONST("2p", "two-point interpolation", 0, "interp"),
CONST("4p", "four-point interpolation", 1, "interp"),
CONST("6p", "six-point interpolation", 2, "interp"),
{ NULL }
};
AVFILTER_DEFINE_CLASS(estdif);
static const enum AVPixelFormat pix_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_YUVJ444P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
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_GRAY16,
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_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12,
AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_NONE
};
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
AVFilterLink *inlink = ctx->inputs[0];
ESTDIFContext *s = ctx->priv;
outlink->time_base = av_mul_q(inlink->time_base, (AVRational){1, 2});
if (s->mode)
outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2, 1});
return 0;
}
typedef struct ThreadData {
AVFrame *out, *in;
} ThreadData;
#define MIDL(type, ss) \
static unsigned midl_##ss(const type *const prev, \
const type *const next, \
int end, int x, int k) \
{ \
return (prev[av_clip(x + k, 0, end)] + \
next[av_clip(x - k, 0, end)] + 1) >> 1; \
}
MIDL(uint8_t, 8)
MIDL(uint16_t, 16)
#define MID2(type, ss) \
static unsigned mid2_##ss(const type *const prev, \
const type *const next, \
const type *const prev2, \
const type *const next2, \
const type *const prev3, \
const type *const next3, \
int end, int x, int k, int depth) \
{ \
return (prev[av_clip(x + k, 0, end)] + \
next[av_clip(x - k, 0, end)] + 1) >> 1; \
}
MID2(uint8_t, 8)
MID2(uint16_t, 16)
#define MID4(type, ss) \
static unsigned mid4_##ss(const type *const prev, \
const type *const next, \
const type *const prev2, \
const type *const next2, \
const type *const prev3, \
const type *const next3, \
int end, int x, int k, int depth) \
{ \
return av_clip_uintp2_c(( \
9 * (prev[av_clip(x + k, 0, end)] + \
next[av_clip(x - k, 0, end)]) - \
1 * (prev2[av_clip(x + k*3, 0, end)] + \
next2[av_clip(x - k*3, 0, end)]) + 8) >> 4, \
depth); \
}
MID4(uint8_t, 8)
MID4(uint16_t, 16)
#define MID6(type, ss) \
static unsigned mid6_##ss(const type *const prev, \
const type *const next, \
const type *const prev2, \
const type *const next2, \
const type *const prev3, \
const type *const next3, \
int end, int x, int k, int depth) \
{ \
return av_clip_uintp2_c(( \
20 * (prev[av_clip(x + k, 0, end)] + \
next[av_clip(x - k, 0, end)]) - \
5 * (prev2[av_clip(x + k*3, 0, end)] + \
next2[av_clip(x - k*3, 0, end)]) + \
1 * (prev3[av_clip(x + k*5, 0, end)] + \
next3[av_clip(x - k*5, 0, end)]) + 16) >> 5, \
depth); \
}
MID6(uint8_t, 8)
MID6(uint16_t, 16)
#define DIFF(type, ss) \
static unsigned diff_##ss(const type *const prev, \
const type *const next, \
int x, int y) \
{ \
return FFABS(prev[x] - next[y]); \
}
DIFF(uint8_t, 8)
DIFF(uint16_t, 16)
#define COST(type, ss) \
static unsigned cost_##ss(const type *const prev, \
const type *const next, \
int end, int x, int k) \
{ \
const int m = midl_##ss(prev, next, end, x, k); \
const int p = prev[x]; \
const int n = next[x]; \
\
return FFABS(p - m) + FFABS(n - m); \
}
COST(uint8_t, 8)
COST(uint16_t, 16)
#define INTERPOLATE(type, atype, amax, ss) \
static void interpolate_##ss(ESTDIFContext *s, uint8_t *ddst, \
const uint8_t *const pprev_line, \
const uint8_t *const nnext_line, \
const uint8_t *const pprev2_line, \
const uint8_t *const nnext2_line, \
const uint8_t *const pprev3_line, \
const uint8_t *const nnext3_line, \
int x, int width, int rslope, \
int redge, int depth, \
int *K) \
{ \
type *dst = (type *)ddst; \
const type *const prev_line = (const type *const)pprev_line; \
const type *const prev2_line = (const type *const)pprev2_line; \
const type *const prev3_line = (const type *const)pprev3_line; \
const type *const next_line = (const type *const)nnext_line; \
const type *const next2_line = (const type *const)nnext2_line; \
const type *const next3_line = (const type *const)nnext3_line; \
const int interp = s->interp; \
const int ecost = s->ecost; \
const int dcost = s->dcost; \
const int mcost = s->mcost; \
atype sd[S], sD[S], di = 0; \
const int end = width - 1; \
atype dmin = amax; \
int id = 0, iD = 0; \
int k = *K; \
\
for (int i = -rslope; i <= rslope && abs(k) > rslope; i++) { \
atype sum = 0; \
\
for (int j = -redge; j <= redge; j++) { \
const int xx = av_clip(x + i + j, 0, end); \
const int yy = av_clip(x - i + j, 0, end); \
sum += diff_##ss(prev_line, next_line, xx, yy); \
sum += diff_##ss(prev2_line, prev_line, xx, yy); \
sum += diff_##ss(next_line, next2_line, xx, yy); \
} \
\
sD[i + rslope] = ecost * sum; \
sD[i + rslope] += mcost * cost_##ss(prev_line, next_line, end, x, i);\
sD[i + rslope] += dcost * abs(i); \
\
if (dmin > sD[i + rslope]) { \
dmin = sD[i + rslope]; \
di = 1; \
iD = i; \
} \
} \
\
for (int i = -rslope; i <= rslope; i++) { \
atype sum = 0; \
\
for (int j = -redge; j <= redge; j++) { \
const int xx = av_clip(x + k + i + j, 0, end); \
const int yy = av_clip(x - k - i + j, 0, end); \
sum += diff_##ss(prev_line, next_line, xx, yy); \
sum += diff_##ss(prev2_line, prev_line, xx, yy); \
sum += diff_##ss(next_line, next2_line, xx, yy); \
} \
\
sd[i + rslope] = ecost * sum; \
sd[i + rslope] += mcost * cost_##ss(prev_line, next_line, end, x, k+i);\
sd[i + rslope] += dcost * abs(k + i); \
\
if (dmin > sd[i + rslope]) { \
dmin = sd[i + rslope]; \
di = 0; \
id = i; \
} \
} \
\
k = di ? iD : k + id; \
\
dst[x] = s->mid_##ss[interp](prev_line, next_line, \
prev2_line, next2_line, \
prev3_line, next3_line, \
end, x, k, depth); \
\
*K = k; \
}
INTERPOLATE(uint8_t, unsigned, UINT_MAX, 8)
INTERPOLATE(uint16_t, uint64_t, UINT64_MAX, 16)
static int deinterlace_slice(AVFilterContext *ctx, void *arg,
int jobnr, int nb_jobs)
{
ESTDIFContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *out = td->out;
AVFrame *in = td->in;
const int rslope = s->rslope;
const int redge = s->redge;
const int depth = s->depth;
const int interlaced = !!(in->flags & AV_FRAME_FLAG_INTERLACED);
const int tff = (s->field == (s->parity == -1 ? interlaced ? !!(in->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST) : 1 :
s->parity ^ 1));
for (int plane = 0; plane < s->nb_planes; plane++) {
const uint8_t *src_data = in->data[plane];
uint8_t *dst_data = out->data[plane];
const int linesize = s->linesize[plane];
const int width = s->planewidth[plane];
const int height = s->planeheight[plane];
const int src_linesize = in->linesize[plane];
const int dst_linesize = out->linesize[plane];
const int start = (height * jobnr) / nb_jobs;
const int end = (height * (jobnr+1)) / nb_jobs;
const uint8_t *prev_line, *prev2_line, *next_line, *next2_line, *in_line;
const uint8_t *prev3_line, *next3_line;
uint8_t *out_line;
int y_out;
y_out = start + (tff ^ (start & 1));
in_line = src_data + (y_out * src_linesize);
out_line = dst_data + (y_out * dst_linesize);
while (y_out < end) {
memcpy(out_line, in_line, linesize);
y_out += 2;
in_line += src_linesize * 2;
out_line += dst_linesize * 2;
}
y_out = start + ((!tff) ^ (start & 1));
out_line = dst_data + (y_out * dst_linesize);
for (int y = y_out; y < end; y += 2) {
int y_prev3_in = y - 5;
int y_next3_in = y + 5;
int y_prev2_in = y - 3;
int y_next2_in = y + 3;
int y_prev_in = y - 1;
int y_next_in = y + 1;
int k;
while (y_prev3_in < 0)
y_prev3_in += 2;
while (y_next3_in >= height)
y_next3_in -= 2;
while (y_prev2_in < 0)
y_prev2_in += 2;
while (y_next2_in >= height)
y_next2_in -= 2;
while (y_prev_in < 0)
y_prev_in += 2;
while (y_next_in >= height)
y_next_in -= 2;
prev3_line = src_data + (y_prev3_in * src_linesize);
next3_line = src_data + (y_next3_in * src_linesize);
prev2_line = src_data + (y_prev2_in * src_linesize);
next2_line = src_data + (y_next2_in * src_linesize);
prev_line = src_data + (y_prev_in * src_linesize);
next_line = src_data + (y_next_in * src_linesize);
k = 0;
for (int x = 0; x < width; x++) {
s->interpolate(s, out_line,
prev_line, next_line,
prev2_line, next2_line,
prev3_line, next3_line,
x, width, rslope, redge, depth, &k);
}
out_line += 2 * dst_linesize;
}
}
return 0;
}
static int filter(AVFilterContext *ctx, AVFrame *in, int64_t pts, int64_t duration)
{
ESTDIFContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
AVFrame *out;
ThreadData td;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
return AVERROR(ENOMEM);
av_frame_copy_props(out, in);
#if FF_API_INTERLACED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
out->interlaced_frame = 0;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
out->flags &= ~AV_FRAME_FLAG_INTERLACED;
out->pts = pts;
out->duration = duration;
td.out = out; td.in = in;
ff_filter_execute(ctx, deinterlace_slice, &td, NULL,
FFMIN(s->planeheight[1] / 2, s->nb_threads));
if (s->mode)
s->field = !s->field;
return ff_filter_frame(outlink, out);
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
ESTDIFContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int ret;
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
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;
if (inlink->h < 3) {
av_log(ctx, AV_LOG_ERROR, "Video of less than 3 lines is not supported\n");
return AVERROR(EINVAL);
}
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
s->nb_threads = ff_filter_get_nb_threads(ctx);
s->depth = desc->comp[0].depth;
s->interpolate = s->depth <= 8 ? interpolate_8 : interpolate_16;
s->mid_8[0] = mid2_8;
s->mid_8[1] = mid4_8;
s->mid_8[2] = mid6_8;
s->mid_16[0] = mid2_16;
s->mid_16[1] = mid4_16;
s->mid_16[2] = mid6_16;
s->max = (1 << (s->depth)) - 1;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
ESTDIFContext *s = ctx->priv;
int ret;
if (!s->prev) {
s->prev = in;
return 0;
}
if ((s->deint && !(s->prev->flags & AV_FRAME_FLAG_INTERLACED)) || ctx->is_disabled) {
s->prev->pts *= 2;
s->prev->duration *= 2;
ret = ff_filter_frame(ctx->outputs[0], s->prev);
s->prev = in;
return ret;
}
ret = filter(ctx, s->prev, s->prev->pts * 2,
s->prev->duration * (s->mode ? 1 : 2));
if (ret < 0 || s->mode == 0) {
av_frame_free(&s->prev);
s->prev = in;
return ret;
}
ret = filter(ctx, s->prev, s->prev->pts + in->pts, in->duration);
av_frame_free(&s->prev);
s->prev = in;
return ret;
}
static int request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
ESTDIFContext *s = ctx->priv;
int ret;
if (s->eof)
return AVERROR_EOF;
ret = ff_request_frame(ctx->inputs[0]);
if (ret == AVERROR_EOF && s->prev) {
AVFrame *next = av_frame_clone(s->prev);
if (!next)
return AVERROR(ENOMEM);
next->pts = s->prev->pts + av_rescale_q(1, av_inv_q(ctx->outputs[0]->frame_rate),
ctx->outputs[0]->time_base);
s->eof = 1;
ret = filter_frame(ctx->inputs[0], next);
} else if (ret < 0) {
return ret;
}
return ret;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ESTDIFContext *s = ctx->priv;
av_frame_free(&s->prev);
}
static const AVFilterPad estdif_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad estdif_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
.request_frame = request_frame,
},
};
const AVFilter ff_vf_estdif = {
.name = "estdif",
.description = NULL_IF_CONFIG_SMALL("Apply Edge Slope Tracing deinterlace."),
.priv_size = sizeof(ESTDIFContext),
.priv_class = &estdif_class,
.uninit = uninit,
FILTER_INPUTS(estdif_inputs),
FILTER_OUTPUTS(estdif_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
.process_command = ff_filter_process_command,
};