/*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2013 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
*/
/**
* @file
* (de)interleave fields filter
*/
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
enum FilterMode {
MODE_NONE,
MODE_INTERLEAVE,
MODE_DEINTERLEAVE
};
typedef struct {
const AVClass *class;
int luma_mode, chroma_mode, alpha_mode; ///<FilterMode
int luma_swap, chroma_swap, alpha_swap;
int nb_planes;
int linesize[4], chroma_height;
int has_alpha;
} IlContext;
#define OFFSET(x) offsetof(IlContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption il_options[] = {
{"luma_mode", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
{"l", "select luma mode", OFFSET(luma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "luma_mode"},
{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "luma_mode"},
{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "luma_mode"},
{"chroma_mode", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
{"c", "select chroma mode", OFFSET(chroma_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "chroma_mode"},
{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "chroma_mode"},
{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "chroma_mode"},
{"alpha_mode", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
{"a", "select alpha mode", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=MODE_NONE}, MODE_NONE, MODE_DEINTERLEAVE, FLAGS, "alpha_mode"},
{"none", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_NONE}, 0, 0, FLAGS, "alpha_mode"},
{"interleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"i", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"deinterleave", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"d", NULL, 0, AV_OPT_TYPE_CONST, {.i64=MODE_DEINTERLEAVE}, 0, 0, FLAGS, "alpha_mode"},
{"luma_swap", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"ls", "swap luma fields", OFFSET(luma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"chroma_swap", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"cs", "swap chroma fields", OFFSET(chroma_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"alpha_swap", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{"as", "swap alpha fields", OFFSET(alpha_swap), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS},
{NULL}
};
AVFILTER_DEFINE_CLASS(il);
static int query_formats(AVFilterContext *ctx)
{
AVFilterFormats *formats = NULL;
int fmt;
for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
if (!(desc->flags & AV_PIX_FMT_FLAG_PAL) && !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL))
ff_add_format(&formats, fmt);
}
return ff_set_common_formats(ctx, formats);
}
static int config_input(AVFilterLink *inlink)
{
IlContext *s = inlink->dst->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int ret;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
s->has_alpha = !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
s->chroma_height = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
return 0;
}
static void interleave(uint8_t *dst, uint8_t *src, int w, int h,
int dst_linesize, int src_linesize,
enum FilterMode mode, int swap)
{
const int a = swap;
const int b = 1 - a;
const int m = h >> 1;
int y;
switch (mode) {
case MODE_DEINTERLEAVE:
for (y = 0; y < m; y++) {
memcpy(dst
+ dst_linesize
* y
, src
+ src_linesize
* (y
* 2 + a
), w
); memcpy(dst
+ dst_linesize
* (y
+ m
), src
+ src_linesize
* (y
* 2 + b
), w
); }
break;
case MODE_NONE:
for (y = 0; y < m; y++) {
memcpy(dst
+ dst_linesize
* y
* 2 , src
+ src_linesize
* (y
* 2 + a
), w
); memcpy(dst
+ dst_linesize
* (y
* 2 + 1), src
+ src_linesize
* (y
* 2 + b
), w
); }
break;
case MODE_INTERLEAVE:
for (y = 0; y < m; y++) {
memcpy(dst
+ dst_linesize
* (y
* 2 + a
), src
+ src_linesize
* y
, w
); memcpy(dst
+ dst_linesize
* (y
* 2 + b
), src
+ src_linesize
* (y
+ m
), w
); }
break;
}
}
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
{
IlContext *s = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
AVFrame *out;
int comp;
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
av_frame_free(&inpicref);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, inpicref);
interleave(out->data[0], inpicref->data[0],
s->linesize[0], inlink->h,
out->linesize[0], inpicref->linesize[0],
s->luma_mode, s->luma_swap);
for (comp = 1; comp < (s->nb_planes - s->has_alpha); comp++) {
interleave(out->data[comp], inpicref->data[comp],
s->linesize[comp], s->chroma_height,
out->linesize[comp], inpicref->linesize[comp],
s->chroma_mode, s->chroma_swap);
}
if (s->has_alpha) {
comp = s->nb_planes - 1;
interleave(out->data[comp], inpicref->data[comp],
s->linesize[comp], inlink->h,
out->linesize[comp], inpicref->linesize[comp],
s->alpha_mode, s->alpha_swap);
}
av_frame_free(&inpicref);
return ff_filter_frame(outlink, out);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};
static const AVFilterPad outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_il = {
.name = "il",
.description = NULL_IF_CONFIG_SMALL("Deinterleave or interleave fields."),
.priv_size = sizeof(IlContext),
.query_formats = query_formats,
.inputs = inputs,
.outputs = outputs,
.priv_class = &il_class,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};