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avfilter: add BobWeaver deinterlacing filter

tags/n3.1
Thomas Mundt Paul B Mahol 10 years ago
parent
08acab85d3
commit
da94d619f6
6 changed files with 682 additions and 1 deletions
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  1. +1
    -0
      Changelog
  2. +53
    -0
      doc/filters.texi
  3. +1
    -0
      libavfilter/Makefile
  4. +1
    -0
      libavfilter/allfilters.c
  5. +1
    -1
      libavfilter/version.h
  6. +625
    -0
      libavfilter/vf_bwdif.c

+ 1
- 0
Changelog View File

@@ -5,6 +5,7 @@ version <next>:
- DXVA2-accelerated HEVC Main10 decoding
- fieldhint filter
- loop video filter and aloop audio filter
- Bob Weaver deinterlacing filter


version 3.0:


+ 53
- 0
doc/filters.texi View File

@@ -4256,6 +4256,59 @@ tblend=all_mode=difference128
@end example
@end itemize

@section bwdif

Deinterlace the input video ("bwdif" stands for "Bob Weaver
Deinterlacing Filter").

Motion adaptive deinterlacing based on yadif with the use of w3fdif and cubic
interpolation algorithms.
It accepts the following parameters:

@table @option
@item mode
The interlacing mode to adopt. It accepts one of the following values:

@table @option
@item 0, send_frame
Output one frame for each frame.
@item 1, send_field
Output one frame for each field.
@end table

The default value is @code{send_field}.

@item parity
The picture field parity assumed for the input interlaced video. It accepts one
of the following values:

@table @option
@item 0, tff
Assume the top field is first.
@item 1, bff
Assume the bottom field is first.
@item -1, auto
Enable automatic detection of field parity.
@end table

The default value is @code{auto}.
If the interlacing is unknown or the decoder does not export this information,
top field first will be assumed.

@item deint
Specify which frames to deinterlace. Accept one of the following
values:

@table @option
@item 0, all
Deinterlace all frames.
@item 1, interlaced
Only deinterlace frames marked as interlaced.
@end table

The default value is @code{all}.
@end table

@section boxblur

Apply a boxblur algorithm to the input video.


+ 1
- 0
libavfilter/Makefile View File

@@ -119,6 +119,7 @@ OBJS-$(CONFIG_BLACKDETECT_FILTER) += vf_blackdetect.o
OBJS-$(CONFIG_BLACKFRAME_FILTER) += vf_blackframe.o
OBJS-$(CONFIG_BLEND_FILTER) += vf_blend.o dualinput.o framesync.o
OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o
OBJS-$(CONFIG_BWDIF_FILTER) += vf_bwdif.o
OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o
OBJS-$(CONFIG_CODECVIEW_FILTER) += vf_codecview.o
OBJS-$(CONFIG_COLORBALANCE_FILTER) += vf_colorbalance.o


+ 1
- 0
libavfilter/allfilters.c View File

@@ -140,6 +140,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(BLACKFRAME, blackframe, vf);
REGISTER_FILTER(BLEND, blend, vf);
REGISTER_FILTER(BOXBLUR, boxblur, vf);
REGISTER_FILTER(BWDIF, bwdif, vf);
REGISTER_FILTER(CHROMAKEY, chromakey, vf);
REGISTER_FILTER(CODECVIEW, codecview, vf);
REGISTER_FILTER(COLORBALANCE, colorbalance, vf);


+ 1
- 1
libavfilter/version.h View File

@@ -30,7 +30,7 @@
#include "libavutil/version.h"

#define LIBAVFILTER_VERSION_MAJOR 6
#define LIBAVFILTER_VERSION_MINOR 33
#define LIBAVFILTER_VERSION_MINOR 34
#define LIBAVFILTER_VERSION_MICRO 100

#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \


+ 625
- 0
libavfilter/vf_bwdif.c View File

@@ -0,0 +1,625 @@
/*
* BobWeaver Deinterlacing Filter
* Copyright (C) 2016 Thomas Mundt <loudmax@yahoo.de>
*
* Based on YADIF (Yet Another Deinterlacing Filter)
* Copyright (C) 2006-2011 Michael Niedermayer <michaelni@gmx.at>
* 2010 James Darnley <james.darnley@gmail.com>
*
* With use of Weston 3 Field Deinterlacing Filter algorithm
* Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved
* Author of de-interlace algorithm: Jim Easterbrook for BBC R&D
* Based on the process described by Martin Weston for BBC R&D
*
* 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/avassert.h"
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "formats.h"
#include "internal.h"
#include "video.h"

/*
* Filter coefficients coef_lf and coef_hf taken from BBC PH-2071 (Weston 3 Field Deinterlacer).
* Used when there is spatial and temporal interpolation.
* Filter coefficients coef_sp are used when there is spatial interpolation only.
* Adjusted for matching visual sharpness impression of spatial and temporal interpolation.
*/
static const uint16_t coef_lf[2] = { 4309, 213 };
static const uint16_t coef_hf[3] = { 5570, 3801, 1016 };
static const uint16_t coef_sp[2] = { 5077, 981 };

enum BWDIFMode {
BWDIF_MODE_SEND_FRAME = 0, ///< send 1 frame for each frame
BWDIF_MODE_SEND_FIELD = 1, ///< send 1 frame for each field
};

enum BWDIFParity {
BWDIF_PARITY_TFF = 0, ///< top field first
BWDIF_PARITY_BFF = 1, ///< bottom field first
BWDIF_PARITY_AUTO = -1, ///< auto detection
};

enum BWDIFDeint {
BWDIF_DEINT_ALL = 0, ///< deinterlace all frames
BWDIF_DEINT_INTERLACED = 1, ///< only deinterlace frames marked as interlaced
};

typedef struct BWDIFContext {
const AVClass *class;

int mode; ///< BWDIFMode
int parity; ///< BWDIFParity
int deint; ///< BWDIFDeint

int frame_pending;

AVFrame *cur;
AVFrame *next;
AVFrame *prev;
AVFrame *out;

void (*filter_intra)(void *dst1, void *cur1, int w, int prefs, int mrefs,
int prefs3, int mrefs3, int parity, int clip_max);
void (*filter_line)(void *dst, void *prev, void *cur, void *next,
int w, int prefs, int mrefs, int prefs2, int mrefs2,
int prefs3, int mrefs3, int prefs4, int mrefs4,
int parity, int clip_max);
void (*filter_edge)(void *dst, void *prev, void *cur, void *next,
int w, int prefs, int mrefs, int prefs2, int mrefs2,
int parity, int clip_max, int spat);

const AVPixFmtDescriptor *csp;
int inter_field;
int eof;
} BWDIFContext;

typedef struct ThreadData {
AVFrame *frame;
int plane;
int w, h;
int parity;
int tff;
} ThreadData;

#define FILTER_INTRA() \
for (x = 0; x < w; x++) { \
interpol = (coef_sp[0] * (cur[mrefs] + cur[prefs]) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
dst[0] = av_clip(interpol, 0, clip_max); \
\
dst++; \
cur++; \
}

#define FILTER1() \
for (x = 0; x < w; x++) { \
int c = cur[mrefs]; \
int d = (prev2[0] + next2[0]) >> 1; \
int e = cur[prefs]; \
int temporal_diff0 = FFABS(prev2[0] - next2[0]); \
int temporal_diff1 =(FFABS(prev[mrefs] - c) + FFABS(prev[prefs] - e)) >> 1; \
int temporal_diff2 =(FFABS(next[mrefs] - c) + FFABS(next[prefs] - e)) >> 1; \
int diff = FFMAX3(temporal_diff0 >> 1, temporal_diff1, temporal_diff2); \
\
if (!diff) { \
dst[0] = d; \
} else {

#define SPAT_CHECK() \
int b = ((prev2[mrefs2] + next2[mrefs2]) >> 1) - c; \
int f = ((prev2[prefs2] + next2[prefs2]) >> 1) - e; \
int dc = d - c; \
int de = d - e; \
int max = FFMAX3(de, dc, FFMIN(b, f)); \
int min = FFMIN3(de, dc, FFMAX(b, f)); \
diff = FFMAX3(diff, min, -max);

#define FILTER_LINE() \
SPAT_CHECK() \
if (FFABS(c - e) > temporal_diff0) { \
interpol = (((coef_hf[0] * (prev2[0] + next2[0]) \
- coef_hf[1] * (prev2[mrefs2] + next2[mrefs2] + prev2[prefs2] + next2[prefs2]) \
+ coef_hf[2] * (prev2[mrefs4] + next2[mrefs4] + prev2[prefs4] + next2[prefs4])) >> 2) \
+ coef_lf[0] * (c + e) - coef_lf[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
} else { \
interpol = (coef_sp[0] * (c + e) - coef_sp[1] * (cur[mrefs3] + cur[prefs3])) >> 13; \
}

#define FILTER_EDGE() \
if (spat) { \
SPAT_CHECK() \
} \
interpol = (c + e) >> 1;

#define FILTER2() \
if (interpol > d + diff) \
interpol = d + diff; \
else if (interpol < d - diff) \
interpol = d - diff; \
\
dst[0] = av_clip(interpol, 0, clip_max); \
} \
\
dst++; \
cur++; \
prev++; \
next++; \
prev2++; \
next2++; \
}

static void filter_intra(void *dst1, void *cur1, int w, int prefs, int mrefs,
int prefs3, int mrefs3, int parity, int clip_max)
{
uint8_t *dst = dst1;
uint8_t *cur = cur1;
int interpol, x;

FILTER_INTRA()
}

static void filter_line(void *dst1, void *prev1, void *cur1, void *next1,
int w, int prefs, int mrefs, int prefs2, int mrefs2,
int prefs3, int mrefs3, int prefs4, int mrefs4,
int parity, int clip_max)
{
uint8_t *dst = dst1;
uint8_t *prev = prev1;
uint8_t *cur = cur1;
uint8_t *next = next1;
uint8_t *prev2 = parity ? prev : cur ;
uint8_t *next2 = parity ? cur : next;
int interpol, x;

FILTER1()
FILTER_LINE()
FILTER2()
}

static void filter_edge(void *dst1, void *prev1, void *cur1, void *next1,
int w, int prefs, int mrefs, int prefs2, int mrefs2,
int parity, int clip_max, int spat)
{
uint8_t *dst = dst1;
uint8_t *prev = prev1;
uint8_t *cur = cur1;
uint8_t *next = next1;
uint8_t *prev2 = parity ? prev : cur ;
uint8_t *next2 = parity ? cur : next;
int interpol, x;

FILTER1()
FILTER_EDGE()
FILTER2()
}

static void filter_intra_16bit(void *dst1, void *cur1, int w, int prefs, int mrefs,
int prefs3, int mrefs3, int parity, int clip_max)
{
uint16_t *dst = dst1;
uint16_t *cur = cur1;
int interpol, x;

FILTER_INTRA()
}

static void filter_line_16bit(void *dst1, void *prev1, void *cur1, void *next1,
int w, int prefs, int mrefs, int prefs2, int mrefs2,
int prefs3, int mrefs3, int prefs4, int mrefs4,
int parity, int clip_max)
{
uint16_t *dst = dst1;
uint16_t *prev = prev1;
uint16_t *cur = cur1;
uint16_t *next = next1;
uint16_t *prev2 = parity ? prev : cur ;
uint16_t *next2 = parity ? cur : next;
int interpol, x;

FILTER1()
FILTER_LINE()
FILTER2()
}

static void filter_edge_16bit(void *dst1, void *prev1, void *cur1, void *next1,
int w, int prefs, int mrefs, int prefs2, int mrefs2,
int parity, int clip_max, int spat)
{
uint16_t *dst = dst1;
uint16_t *prev = prev1;
uint16_t *cur = cur1;
uint16_t *next = next1;
uint16_t *prev2 = parity ? prev : cur ;
uint16_t *next2 = parity ? cur : next;
int interpol, x;

FILTER1()
FILTER_EDGE()
FILTER2()
}

static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
BWDIFContext *s = ctx->priv;
ThreadData *td = arg;
int linesize = s->cur->linesize[td->plane];
int clip_max = (1 << (s->csp->comp[td->plane].depth)) - 1;
int df = (s->csp->comp[td->plane].depth + 7) / 8;
int refs = linesize / df;
int slice_start = (td->h * jobnr ) / nb_jobs;
int slice_end = (td->h * (jobnr+1)) / nb_jobs;
int y;

for (y = slice_start; y < slice_end; y++) {
if ((y ^ td->parity) & 1) {
uint8_t *prev = &s->prev->data[td->plane][y * linesize];
uint8_t *cur = &s->cur ->data[td->plane][y * linesize];
uint8_t *next = &s->next->data[td->plane][y * linesize];
uint8_t *dst = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]];
if (!s->inter_field) {
s->filter_intra(dst, cur, td->w, (y + df) < td->h ? refs : -refs,
y > (df - 1) ? -refs : refs,
(y + 3*df) < td->h ? 3 * refs : -refs,
y > (3*df - 1) ? -3 * refs : refs,
td->parity ^ td->tff, clip_max);
} else if ((y < 4) || ((y + 5) > td->h)) {
s->filter_edge(dst, prev, cur, next, td->w,
(y + df) < td->h ? refs : -refs,
y > (df - 1) ? -refs : refs,
refs << 1, -(refs << 1),
td->parity ^ td->tff, clip_max,
(y < 2) || ((y + 3) > td->h) ? 0 : 1);
} else {
s->filter_line(dst, prev, cur, next, td->w,
refs, -refs, refs << 1, -(refs << 1),
3 * refs, -3 * refs, refs << 2, -(refs << 2),
td->parity ^ td->tff, clip_max);
}
} else {
memcpy(&td->frame->data[td->plane][y * td->frame->linesize[td->plane]],
&s->cur->data[td->plane][y * linesize], td->w * df);
}
}
return 0;
}

static void filter(AVFilterContext *ctx, AVFrame *dstpic,
int parity, int tff)
{
BWDIFContext *bwdif = ctx->priv;
ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff };
int i;

for (i = 0; i < bwdif->csp->nb_components; i++) {
int w = dstpic->width;
int h = dstpic->height;

if (i == 1 || i == 2) {
w = AV_CEIL_RSHIFT(w, bwdif->csp->log2_chroma_w);
h = AV_CEIL_RSHIFT(h, bwdif->csp->log2_chroma_h);
}

td.w = w;
td.h = h;
td.plane = i;

ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(h, ctx->graph->nb_threads));
}
if (!bwdif->inter_field) {
bwdif->inter_field = 1;
}

emms_c();
}

static int return_frame(AVFilterContext *ctx, int is_second)
{
BWDIFContext *bwdif = ctx->priv;
AVFilterLink *link = ctx->outputs[0];
int tff, ret;

if (bwdif->parity == -1) {
tff = bwdif->cur->interlaced_frame ?
bwdif->cur->top_field_first : 1;
} else {
tff = bwdif->parity ^ 1;
}

if (is_second) {
bwdif->out = ff_get_video_buffer(link, link->w, link->h);
if (!bwdif->out)
return AVERROR(ENOMEM);

av_frame_copy_props(bwdif->out, bwdif->cur);
bwdif->out->interlaced_frame = 0;
if (bwdif->inter_field < 0)
bwdif->inter_field = 0;
}

filter(ctx, bwdif->out, tff ^ !is_second, tff);

if (is_second) {
int64_t cur_pts = bwdif->cur->pts;
int64_t next_pts = bwdif->next->pts;

if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) {
bwdif->out->pts = cur_pts + next_pts;
} else {
bwdif->out->pts = AV_NOPTS_VALUE;
}
}
ret = ff_filter_frame(ctx->outputs[0], bwdif->out);

bwdif->frame_pending = (bwdif->mode&1) && !is_second;
return ret;
}

static int checkstride(BWDIFContext *bwdif, const AVFrame *a, const AVFrame *b)
{
int i;
for (i = 0; i < bwdif->csp->nb_components; i++)
if (a->linesize[i] != b->linesize[i])
return 1;
return 0;
}

static void fixstride(AVFilterLink *link, AVFrame *f)
{
AVFrame *dst = ff_default_get_video_buffer(link, f->width, f->height);
if(!dst)
return;
av_frame_copy_props(dst, f);
av_image_copy(dst->data, dst->linesize,
(const uint8_t **)f->data, f->linesize,
dst->format, dst->width, dst->height);
av_frame_unref(f);
av_frame_move_ref(f, dst);
av_frame_free(&dst);
}

static int filter_frame(AVFilterLink *link, AVFrame *frame)
{
AVFilterContext *ctx = link->dst;
BWDIFContext *bwdif = ctx->priv;

av_assert0(frame);

if (bwdif->frame_pending)
return_frame(ctx, 1);

if (bwdif->prev)
av_frame_free(&bwdif->prev);
bwdif->prev = bwdif->cur;
bwdif->cur = bwdif->next;
bwdif->next = frame;

if (!bwdif->cur) {
bwdif->cur = av_frame_clone(bwdif->next);
if (!bwdif->cur)
return AVERROR(ENOMEM);
bwdif->inter_field = 0;
}

if (checkstride(bwdif, bwdif->next, bwdif->cur)) {
av_log(ctx, AV_LOG_VERBOSE, "Reallocating frame due to differing stride\n");
fixstride(link, bwdif->next);
}
if (checkstride(bwdif, bwdif->next, bwdif->cur))
fixstride(link, bwdif->cur);
if (bwdif->prev && checkstride(bwdif, bwdif->next, bwdif->prev))
fixstride(link, bwdif->prev);
if (checkstride(bwdif, bwdif->next, bwdif->cur) || (bwdif->prev && checkstride(bwdif, bwdif->next, bwdif->prev))) {
av_log(ctx, AV_LOG_ERROR, "Failed to reallocate frame\n");
return -1;
}

if (!bwdif->prev)
return 0;

if ((bwdif->deint && !bwdif->cur->interlaced_frame) ||
ctx->is_disabled ||
(bwdif->deint && !bwdif->prev->interlaced_frame && bwdif->prev->repeat_pict) ||
(bwdif->deint && !bwdif->next->interlaced_frame && bwdif->next->repeat_pict)
) {
bwdif->out = av_frame_clone(bwdif->cur);
if (!bwdif->out)
return AVERROR(ENOMEM);

av_frame_free(&bwdif->prev);
if (bwdif->out->pts != AV_NOPTS_VALUE)
bwdif->out->pts *= 2;
return ff_filter_frame(ctx->outputs[0], bwdif->out);
}

bwdif->out = ff_get_video_buffer(ctx->outputs[0], link->w, link->h);
if (!bwdif->out)
return AVERROR(ENOMEM);

av_frame_copy_props(bwdif->out, bwdif->cur);
bwdif->out->interlaced_frame = 0;

if (bwdif->out->pts != AV_NOPTS_VALUE)
bwdif->out->pts *= 2;

return return_frame(ctx, 0);
}

static int request_frame(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
BWDIFContext *bwdif = ctx->priv;
int ret;

if (bwdif->frame_pending) {
return_frame(ctx, 1);
return 0;
}

if (bwdif->eof)
return AVERROR_EOF;

ret = ff_request_frame(link->src->inputs[0]);

if (ret == AVERROR_EOF && bwdif->cur) {
AVFrame *next = av_frame_clone(bwdif->next);

if (!next)
return AVERROR(ENOMEM);

bwdif->inter_field = -1;
next->pts = bwdif->next->pts * 2 - bwdif->cur->pts;

filter_frame(link->src->inputs[0], next);
bwdif->eof = 1;
} else if (ret < 0) {
return ret;
}

return 0;
}

static av_cold void uninit(AVFilterContext *ctx)
{
BWDIFContext *bwdif = ctx->priv;

av_frame_free(&bwdif->prev);
av_frame_free(&bwdif->cur );
av_frame_free(&bwdif->next);
}

static int query_formats(AVFilterContext *ctx)
{
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_YUVJ411P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P,
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_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
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_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP16,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};

AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
if (!fmts_list)
return AVERROR(ENOMEM);

return ff_set_common_formats(ctx, fmts_list);
}

static int config_props(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
BWDIFContext *s = link->src->priv;

link->time_base.num = link->src->inputs[0]->time_base.num;
link->time_base.den = link->src->inputs[0]->time_base.den * 2;
link->w = link->src->inputs[0]->w;
link->h = link->src->inputs[0]->h;

if(s->mode&1)
link->frame_rate = av_mul_q(link->src->inputs[0]->frame_rate, (AVRational){2,1});

if (link->w < 3 || link->h < 3) {
av_log(ctx, AV_LOG_ERROR, "Video of less than 3 columns or lines is not supported\n");
return AVERROR(EINVAL);
}

s->csp = av_pix_fmt_desc_get(link->format);
if (s->csp->comp[0].depth > 8) {
s->filter_intra = filter_intra_16bit;
s->filter_line = filter_line_16bit;
s->filter_edge = filter_edge_16bit;
} else {
s->filter_intra = filter_intra;
s->filter_line = filter_line;
s->filter_edge = filter_edge;
}

return 0;
}


#define OFFSET(x) offsetof(BWDIFContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM

#define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, INT_MIN, INT_MAX, FLAGS, unit }

static const AVOption bwdif_options[] = {
{ "mode", "specify the interlacing mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=BWDIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"},
CONST("send_frame", "send one frame for each frame", BWDIF_MODE_SEND_FRAME, "mode"),
CONST("send_field", "send one frame for each field", BWDIF_MODE_SEND_FIELD, "mode"),

{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=BWDIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
CONST("tff", "assume top field first", BWDIF_PARITY_TFF, "parity"),
CONST("bff", "assume bottom field first", BWDIF_PARITY_BFF, "parity"),
CONST("auto", "auto detect parity", BWDIF_PARITY_AUTO, "parity"),

{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=BWDIF_DEINT_INTERLACED}, 0, 1, FLAGS, "deint" },
CONST("all", "deinterlace all frames", BWDIF_DEINT_ALL, "deint"),
CONST("interlaced", "only deinterlace frames marked as interlaced", BWDIF_DEINT_INTERLACED, "deint"),

{ NULL }
};

AVFILTER_DEFINE_CLASS(bwdif);

static const AVFilterPad avfilter_vf_bwdif_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};

static const AVFilterPad avfilter_vf_bwdif_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = request_frame,
.config_props = config_props,
},
{ NULL }
};

AVFilter ff_vf_bwdif = {
.name = "bwdif",
.description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
.priv_size = sizeof(BWDIFContext),
.priv_class = &bwdif_class,
.uninit = uninit,
.query_formats = query_formats,
.inputs = avfilter_vf_bwdif_inputs,
.outputs = avfilter_vf_bwdif_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
};

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