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/*
* 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/common.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "bwdifdsp.h"
#include "ccfifo.h"
#include "internal.h"
#include "yadif.h"
typedef struct BWDIFContext {
YADIFContext yadif;
BWDIFDSPContext dsp;
} BWDIFContext;
typedef struct ThreadData {
AVFrame *frame;
int plane;
int w, h;
int parity;
int tff;
} ThreadData;
// Round job start line down to multiple of 4 so that if filter_line3 exists
// and the frame is a multiple of 4 high then filter_line will never be called
static inline int job_start(const int jobnr, const int nb_jobs, const int h)
{
return jobnr >= nb_jobs ? h : ((h * jobnr) / nb_jobs) & ~3;
}
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
BWDIFContext *s = ctx->priv;
YADIFContext *yadif = &s->yadif;
ThreadData *td = arg;
int linesize = yadif->cur->linesize[td->plane];
int clip_max = (1 << (yadif->csp->comp[td->plane].depth)) - 1;
int df = (yadif->csp->comp[td->plane].depth + 7) / 8;
int refs = linesize / df;
int slice_start = job_start(jobnr, nb_jobs, td->h);
int slice_end = job_start(jobnr + 1, nb_jobs, td->h);
int y;
for (y = slice_start; y < slice_end; y++) {
if ((y ^ td->parity) & 1) {
uint8_t *prev = &yadif->prev->data[td->plane][y * linesize];
uint8_t *cur = &yadif->cur ->data[td->plane][y * linesize];
uint8_t *next = &yadif->next->data[td->plane][y * linesize];
uint8_t *dst = &td->frame->data[td->plane][y * td->frame->linesize[td->plane]];
if (yadif->current_field == YADIF_FIELD_END) {
s->dsp.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->dsp.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 if (s->dsp.filter_line3 && y + 2 < slice_end && y + 6 < td->h) {
s->dsp.filter_line3(dst, td->frame->linesize[td->plane],
prev, cur, next, linesize, td->w,
td->parity ^ td->tff, clip_max);
y += 2;
} else {
s->dsp.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]],
&yadif->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;
YADIFContext *yadif = &bwdif->yadif;
ThreadData td = { .frame = dstpic, .parity = parity, .tff = tff };
int i;
for (i = 0; i < yadif->csp->nb_components; i++) {
int w = dstpic->width;
int h = dstpic->height;
if (i == 1 || i == 2) {
w = AV_CEIL_RSHIFT(w, yadif->csp->log2_chroma_w);
h = AV_CEIL_RSHIFT(h, yadif->csp->log2_chroma_h);
}
td.w = w;
td.h = h;
td.plane = i;
ff_filter_execute(ctx, filter_slice, &td, NULL,
FFMIN((h+3)/4, ff_filter_get_nb_threads(ctx)));
}
if (yadif->current_field == YADIF_FIELD_END) {
yadif->current_field = YADIF_FIELD_NORMAL;
}
}
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
};
static int config_props(AVFilterLink *link)
{
AVFilterContext *ctx = link->src;
BWDIFContext *s = link->src->priv;
YADIFContext *yadif = &s->yadif;
int ret;
ret = ff_yadif_config_output_common(link);
if (ret < 0)
return AVERROR(EINVAL);
yadif->csp = av_pix_fmt_desc_get(link->format);
yadif->filter = filter;
if (AV_CEIL_RSHIFT(link->w, yadif->csp->log2_chroma_w) < 3 || AV_CEIL_RSHIFT(link->h, yadif->csp->log2_chroma_h) < 4) {
av_log(ctx, AV_LOG_ERROR, "Video with planes less than 3 columns or 4 lines is not supported\n");
return AVERROR(EINVAL);
}
ff_bwdif_init_filter_line(&s->dsp, yadif->csp->comp[0].depth);
return 0;
}
#define OFFSET(x) offsetof(YADIFContext, 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=YADIF_MODE_SEND_FIELD}, 0, 1, FLAGS, "mode"},
CONST("send_frame", "send one frame for each frame", YADIF_MODE_SEND_FRAME, "mode"),
CONST("send_field", "send one frame for each field", YADIF_MODE_SEND_FIELD, "mode"),
{ "parity", "specify the assumed picture field parity", OFFSET(parity), AV_OPT_TYPE_INT, {.i64=YADIF_PARITY_AUTO}, -1, 1, FLAGS, "parity" },
CONST("tff", "assume top field first", YADIF_PARITY_TFF, "parity"),
CONST("bff", "assume bottom field first", YADIF_PARITY_BFF, "parity"),
CONST("auto", "auto detect parity", YADIF_PARITY_AUTO, "parity"),
{ "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=YADIF_DEINT_ALL}, 0, 1, FLAGS, "deint" },
CONST("all", "deinterlace all frames", YADIF_DEINT_ALL, "deint"),
CONST("interlaced", "only deinterlace frames marked as interlaced", YADIF_DEINT_INTERLACED, "deint"),
{ NULL }
};
AVFILTER_DEFINE_CLASS(bwdif);
static const AVFilterPad avfilter_vf_bwdif_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = ff_yadif_filter_frame,
},
};
static const AVFilterPad avfilter_vf_bwdif_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.request_frame = ff_yadif_request_frame,
.config_props = config_props,
},
};
const AVFilter ff_vf_bwdif = {
.name = "bwdif",
.description = NULL_IF_CONFIG_SMALL("Deinterlace the input image."),
.priv_size = sizeof(BWDIFContext),
.priv_class = &bwdif_class,
.uninit = ff_yadif_uninit,
FILTER_INPUTS(avfilter_vf_bwdif_inputs),
FILTER_OUTPUTS(avfilter_vf_bwdif_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | AVFILTER_FLAG_SLICE_THREADS,
};
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